References to A100320

A Catalan transform of (1+2x)/(1-2x).
1, 4, 12, 40, 140, 504, 1848, 6864, 25740, 97240, 369512, 1410864, 5408312

1 seqfan posts

Wed Jul 8 14:39:22 CEST 2009    [seqfan] bulk of A046055 (Orders of finite Abelian groups)
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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