G.f. A(x) satisfies the condition that both A(x) and F(x) = A(x*F(x)) = g.f. of A155585 have zeros for every other coefficient after initial terms; g.f. of dual sequence A157309 satisfies the same condition.
1, 1, 1, 0, 3, 0, 38, 0, 947, 0, 37394, 0, 2120190, 0, 162980012, 0, 16330173251
6 seqfan posts
Thu Nov 12 23:06:27 CET 2009 [seqfan] Re: Surprising Patterns in Tangent and Secant Numbers
Tue Nov 10 15:39:23 CET 2009 [seqfan] Re: Surprising Patterns in Tangent and Secant Numbers
Tue Nov 10 14:09:20 CET 2009 [seqfan] Re: Surprising Patterns in Tangent and Secant Numbers
Tue Nov 10 10:51:14 CET 2009 [seqfan] Re: Surprising Patterns in Tangent and Secant Numbers
Tue Nov 10 08:23:47 CET 2009 [seqfan] Re: Surprising Patterns in Tangent and Secant Numbers
Tue Nov 10 05:57:30 CET 2009 [seqfan] Surprising Patterns in Tangent and Secant Numbers
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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