a(0)=1, a(1)=0, a(n)=4*n*(n-1)*(a(n-1)+2*(n-1)*a(n-2))
1, 0, 16, 384, 23040, 2088960, 278323200, 50969640960, 12290021130240
3 seqfan posts
Sun Jun 10 18:55:29 CEST 2012 [seqfan] Re: M- and N-numbers
Sun Jun 10 18:45:44 CEST 2012 [seqfan] Re: M- and N-numbers
Sun Jun 10 13:43:15 CEST 2012 [seqfan] Re: M- and N-numbers
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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