Numbers n such that 10n+7 is not prime
2, 5, 7, 8, 11, 14, 17, 18, 20, 21, 23, 24, 26, 28, 29, 32, 35, 37, 38, 40, 41, 42, 43, 44
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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