We reached 400000 sequences

[Sean A. Irvine]

The OEIS reached another milestone today, with 400000 published sequences now in the database:

(Nominations for the sequence that will be assigned A400000 are still open.)

Sean.

[Hugo Pfoertner]

Indeed! This is also confirmed by today's snapshot from "stripped.gz". For those interested in statistics:

# OEIS Sequence Data (http://oeis.org/stripped.gz)
# Last Modified: October  6 04:25 UTC 2026
A numbers:
400007
Numbers:
17786918
Negative numbers:
361461
Zeros:
1118364
Ones:
+-1:     1602932
 -1:       77713
 +1:     1525219

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