Numbers n such that n-2^k is a prime for all k > 0 with 2^k < n.
4, 7, 15, 21, 45, 75, 10
2 seqfan posts
Tue Oct 19 04:42:02 CEST 2010 [seqfan] Re: A057652 has no more terms below 10^4
Sat Oct 16 01:42:00 CEST 2010 [seqfan] A057652 has no more terms below 10^4
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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