A052397
formatted as a simple table:
n
a(n)
0
1
1
2
2
6
3
24
4
119
5
694
6
4582
7
33324
8
261808
9
2190688
10
19318688
11
178108704
[1,2,6,24,119,694,4582,33324,261808,2190688, 19318688,178108704]
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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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