Numbers n such that 10*n+1 is not prime.
0, 2, 5, 8, 9, 11, 12, 14, 16, 17, 20, 22, 23, 26, 29, 30, 32, 34, 35, 36, 37, 38, 39, 41
2 seqfan posts
Fri Jan 30 15:12:53 CET 2009 [seqfan] R: Seqfan Digest, Vol 4, Issue 19
Sat Jan 24 16:18:52 CET 2009 [seqfan] Re: [OEIS] Wrong comments
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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