a(n) = A140475(n) - A167707(n).
1, 4, 4, 6, 6, 9, 10, 13, 18, 18, 23, 26, 27, 30, 34, 39, 40, 45, 47, 48, 53, 56, 61, 68, 70
2 seqfan posts
Sun Jun 13 08:51:05 CEST 2010 [seqfan] Re: (3^n+1)/2 is prime, A171381
Sun Jun 13 07:24:58 CEST 2010 [seqfan] (3^n+1)/2 is prime, A171381
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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