2^n - n.
1, 1, 2, 5, 12, 27, 58, 121, 248, 503, 1014, 2037, 4084, 8179, 16370, 32753, 65520
3 seqfan posts
Thu Nov 17 02:01:03 CET 2011 [seqfan] Counting unique sums and products: A048249, A000325(?)
Fri Oct 29 05:35:16 CEST 2010 [seqfan] Implementing first 500 sequences in Java
Sat Jan 17 21:03:39 CET 2009 [seqfan] Re: id: A132045
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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