A139688
formatted as a simple table:
n
a(n)
1
1
2
4
3
40
4
1216
5
123776
6
44030464
7
56185705472
8
261929007759360
9
4520504755804536832
[1,4,40,1216,123776,44030464,56185705472, 261929007759360,4520504755804536832]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 8 08:31 EST 2009. Contains 170430 sequences.
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