A052399
formatted as a simple table:
n
a(n)
0
1
1
2
2
6
3
24
4
120
5
720
6
5039
7
40270
8
361302
9
3587916
10
38957991
11
457647966
12
5763075506
[1,2,6,24,120,720,5039,40270,361302,3587916, 38957991,457647966,5763075506]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
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