Sequence A400000 - preliminary announcement
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Sean A. Irvine
May 10, 2026, 6:44:25 PM (4 days ago) May 10
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Around October or November we expect the OEIS will reach 400000 sequences. To mark that occasion we will be selecting recent sequences for A400000 and possibly a few adjacent A-numbers.
Closer to the time, we will call for nominations of suitable sequences. Members of SeqFan will be eligible to nominate a sequence (either their own or someone else's). The editors-in-chief will select winners from the nominated sequences (details yet to be determined). The existing A-numbers for the winners will be changed to A400000, etc.
We will require nominated sequences to have an A-number >= A395000 or a creation date later than 1 May and to have been submitted by the time nominations close (which will be announced ahead of time). So if you have a specific sequence in mind, feel free to go ahead and submit it now as it will be eligible for nomination.
Please don't send nominations yet.
Sean.
Closer to the time, we will call for nominations of suitable sequences. Members of SeqFan will be eligible to nominate a sequence (either their own or someone else's). The editors-in-chief will select winners from the nominated sequences (details yet to be determined). The existing A-numbers for the winners will be changed to A400000, etc.
We will require nominated sequences to have an A-number >= A395000 or a creation date later than 1 May and to have been submitted by the time nominations close (which will be announced ahead of time). So if you have a specific sequence in mind, feel free to go ahead and submit it now as it will be eligible for nomination.
Please don't send nominations yet.
Sean.
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