A052398
formatted as a simple table:
n
a(n)
0
1
1
2
2
6
3
24
4
120
5
719
6
5003
7
39429
8
344837
9
3291590
10
33835114
11
370531683
[1,2,6,24,120,719,5003,39429,344837,3291590, 33835114,370531683]
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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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