Swinging factorial: 2^{n-(n mod 2)} prod_{1 <= k <= n} k^{(-1)^{k+1}}
1, 1, 2, 6, 6, 30, 20, 140, 70, 630, 252, 2772, 924, 12012, 3432, 51480, 12870
4 seqfan posts
Sat Aug 1 23:33:10 CEST 2009 [seqfan] Re: Comment on A151750 [erratum]
Sat Aug 1 22:44:49 CEST 2009 [seqfan] Re: Comment on A151750 [erratum]
Sat Aug 1 22:28:26 CEST 2009 [seqfan] Re: Comment on A151750
Fri Jul 31 21:44:13 CEST 2009 [seqfan] Comment on A151750
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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