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A009400 formatted as a simple table:

n a(n)
0 0
1 1
2 -1
3 3
4 -10
5 65
6 -376
7 2723
8 -22800
9 226785
10 -2467456
11 29857443
12 -397200640
13 5785047905
14 -91090625536
15 1544546456963
16 -28057896929280
17 543833037679425
18 -11198060484591616
19 244141035610073283
20 -5618437516698910720

[0,1,-1,3,-10,65,-376,2723,-22800,226785,-2467456,
 29857443,-397200640,5785047905,-91090625536,
 1544546456963,-28057896929280,543833037679425,
 -11198060484591616,244141035610073283,
 -5618437516698910720]

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.


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