Numbers n such that n + pi(n) is a prime.
2, 3, 7, 9, 12, 13, 21, 28, 32, 36, 45, 52, 55, 57, 61, 65, 70, 76, 79, 81, 84, 86, 89, 101
2 seqfan posts
Sat Nov 19 16:45:23 CET 2011 [seqfan] Re: A076757
Sat Nov 19 15:32:51 CET 2011 [seqfan] A076757
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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