G.f. satisfies: A(x) = 1/AGM(1, 1 - 8*x/A(x) ).
1, 4, 4, 0, 4, 0, 16, 0, 28, 0, 176, 0, 336, 0, 2496, 0, 4956, 0, 40112, 0, 81488, 0
2 seqfan posts
Mon Mar 29 23:06:44 CEST 2010 [seqfan] Re: Zeros in A172390 and A172391
Mon Mar 29 14:34:32 CEST 2010 [seqfan] Re: Zeros in A172390 and A172391
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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