Numbers n such that 5+38*n^2 is not a prime.
5, 10, 14, 15, 18, 20, 25, 27, 28, 30, 35, 40, 41, 42, 43, 44, 45, 46, 47, 50, 51, 52, 55
3 seqfan posts
Sun Feb 28 14:43:50 CET 2010 [seqfan] Re: A173552 ff.
Sun Feb 28 13:47:00 CET 2010 [seqfan] Re: A173552 ff.
Sun Feb 28 12:55:58 CET 2010 [seqfan] A173552 ff.
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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