Number sequence

Bobby Strack

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Sep 29, 1997, 3:00:00 AM9/29/97

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This one should be fairly easy. What are the next few terms in this
sequence:

5, 8, 12, 18, 24, 30, 36, 42, 52, 60, ...?

Bobby

Chris Cole

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Sep 30, 1997, 3:00:00 AM9/30/97

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Bobby Strack wrote:

Report on [ 5,8,12,18,24,30,36,42,52,60]:
Many tests are carried out, but only potentially useful information
(if any) is reported here.

TEST: IS THE SEQUENCE OF ABSOLUTE VALUES IN THE ENCYCLOPEDIA?

Matches (up to a limit of 10) found for 5 8 12 18 24 30 36 42 52 60 :

%I A011974
%S A011974 2,5,8,12,18,24,30,36,42,52,60,68,78,84,90,100,112,120,
%T A011974 128,138,144,152,162,172,186,198,204,210,216,222,240,258,
%U A011974 268,276,288,300,308,320,330
%N A011974 Sums of 2 successive primes.
%R A011974 EUR 26 12 63.
%O A011974 1,1
%K A011974 nonn
%A A011974 njas

%I A001043 M3780 N0968
%S A001043 5,8,12,18,24,30,36,42,52,60,68,78,84,90,100,112,120,128,138,
%T A001043
144,152,162,172,186,198,204,210,216,222,240,258,268,276,288,300,308,
%U A001043 320,330
%N A001043 Sum of 2 successive primes.
%R A001043 EUR 26 12 63.
%O A001043 1,1
%A A001043 njas
%K A001043 nonn

References (if any):

[EUR] = { Eureka, the Journal of the Archimedeans (Cambridge University
Mathematical Society)}.

SUCCESS: the sequence is in the table.

That is probably enough for now. If this reply
doesn't satisfy you, try again with more terms!

o May '97: Because of the devastating changes made in Maple V.4, many
of
my tests no longer work, and have been temporarily discontinued.
o Dec '96: Take a look at my web page which does lookups "online"! Go
to:
http://www.research.att.com/~njas/sequences
o The whole sequence table is also visible there.
o For more sequences see "The Encyclopedia of Integer Sequences"
by N. J. A. Sloane & S. Plouffe, Academic Press, ISBN
0-12-558630-2.
o IF THE SEQUENCE YOU LOOKED UP WAS NOT IN THE TABLE,
PLEASE SEND IT TO ME AT nj...@research.att.com !
o The server sequ...@research.att.com does a simple lookup in the
On-Line Encyclopedia of Integer Sequences
o Key: %I = ID line: Annnnnn = absolute catalogue number of sequence,
Mnnnn = number in the Encyclopedia,
%S, %T, %U = beginning of sequence, [%V,%W,%X = signed version]
%N = name, %R = references, %Y = cross-references, %A = authority,
%F = formula, %K = keywords, %H = URL address of source, %D = details

of references, %p = Maple; %t = Mathematica; %o = other computer
languages;
%O = offset = [a,b]: a is subscript of first entry, b gives the
position of the first entry >= 2.
References to journals give volume, page, year.
o If the word "lookup" does not appear you will be sent the help file.

Sequentially yours, The On-Line Encyclopedia of Integer Sequences,
N. J. A. Sloane, AT&T Research, Florham Park NJ 07932-0971 USA
nj...@research.att.com

Bobby Strack

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Oct 1, 1997, 3:00:00 AM10/1/97

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Chris,
Very good, that's it. But, what the hell did you use to figure it out?
Looks like the printout from some program. What happened to figuring
out number sequences by examination and ingenuity? (Using nothing more
than maybe a simple {read: non-programmable} calculator.) Oh well,
guess I'm just old-fashioned.

Bobby

White Deer ISD

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Oct 2, 1997, 3:00:00 AM10/2/97

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Bobby Strack wrote:

> This one should be fairly easy. What are the next few terms in this
> sequence:
>
> 5, 8, 12, 18, 24, 30, 36, 42, 52, 60, ...?
>
> Bobby

Would the next few numbers be 66, 72, 78?

Stan Armstrong

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Oct 2, 1997, 3:00:00 AM10/2/97

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In article <6104sb$dk8$0...@206.104.242.48>, White Deer ISD <wdisd02@pan-
tex.net> writes

Not unless 35 is a prime! :-)
>

--
Stan Armstrong "a louse i used to know told me that millionaires
and bums taste much the same to him."

archie the cockroach - via don marquis