Numbers n such that n divides 2^n + 1.
1, 3, 9, 27, 81, 171, 243, 513, 729, 1539, 2187, 3249, 4617, 6561, 9747, 13203
2 seqfan posts
Tue Feb 23 03:36:07 CET 2010 [seqfan] Re: A006521 and n dividing 2^n+1, but not 2^(n-1)+1
Mon Feb 22 23:29:45 CET 2010 [seqfan] A006521 and n dividing 2^n+1, but not 2^(n-1)+1
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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