References to A006542

C(n,3)*C(n-1,3)/4.
1, 10, 50, 175, 490, 1176, 2520, 4950, 9075, 15730, 26026, 41405, 63700, 95200

1 seqfan posts

Mon Oct 26 20:43:57 CET 2009    [seqfan] Re: A metric and UI for Pandora-like OEIS exploration
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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