Bad primes (version 2). Primes not in A028388.
2, 3, 7, 13, 19, 23, 31, 43, 47, 61, 73, 79, 83, 89, 103, 107, 109, 113, 131, 137, 139
3 seqfan posts
Thu Jun 16 06:03:32 CEST 2011 [seqfan] Re: Q A139312 simple prime indicator function
Thu Jun 16 00:20:25 CEST 2011 [seqfan] Re: Q A139312 simple prime indicator function
Wed Jun 15 23:41:36 CEST 2011 [seqfan] Q A139312 simple prime indicator function
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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