**a(n) = 5*a(n-2) - 2*a(n-4), n >= 4; a(n) = (1/6)*(-1)^n + 4/3)*2^n - 1/2.**

*1, 2, 5, 10, 23, 46, 105, 210, 479, 958, 2185, 4370, 9967, 19934, 45465, 90930*

*4 seqfan posts*

*Tue Dec 15 02:58:04 CET 2009* [seqfan] Re: [math-fun] Divisibility sequences in OEIS.

*Tue Dec 15 02:42:24 CET 2009* [seqfan] Re: [math-fun] Divisibility sequences in OEIS.

*Sun Dec 13 19:54:06 CET 2009* [seqfan] Re: [math-fun] Divisibility sequences in OEIS.

*Thu Nov 19 17:19:12 CET 2009* [seqfan] detective work related to Creighton Dement's "Floretions"

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

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