References to A003645

2^n*C(n+1), where C(n) = A000108(n) Catalan numbers.
1, 4, 20, 112, 672, 4224, 27456, 183040, 1244672, 8599552, 60196864, 426008576

1 seqfan posts

Mon Mar 30 10:46:52 CEST 2009    [seqfan] Re: Divisibilty sequences
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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