A006934
formatted as a simple table:
n
a(n)
0
1
1
1
2
21
3
671
4
180323
5
20898423
6
7426362705
7
1874409465055
[1,1,21,671,180323,20898423,7426362705, 1874409465055]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 20 00:58 EST 2009. Contains 171054 sequences.
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