A001904
formatted as a simple table:
n
a(n)
0
1
1
2
2
88
3
3056
4
319616
5
18940160
6
283936226304
[1,2,88,3056,319616,18940160,283936226304]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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