References to A000407

(2n+1)!/n!.
1, 6, 60, 840, 15120, 332640, 8648640, 259459200, 8821612800, 335221286400

1 seqfan posts

Fri Oct 29 05:35:16 CEST 2010    [seqfan] Implementing first 500 sequences in Java
Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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