a(0)=1; a(n) = 5*2^(n-1)-1, n>0.
1, 4, 9, 19, 39, 79, 159, 319, 639, 1279, 2559, 5119, 10239, 20479, 40959, 81919
2 seqfan posts
Fri Oct 21 21:18:09 CEST 2011 [seqfan] Re: Problem with A086224 cross refs
Fri Oct 21 21:03:15 CEST 2011 [seqfan] Problem with A086224 cross refs
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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