A007545
formatted as a simple table:
n
a(n)
0
1
1
20
2
400
3
8902
4
197742
5
4897256
6
120921506
7
3284294545
8
88867026005
[1,20,400,8902,197742,4897256,120921506, 3284294545,88867026005]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 1 13:27 EST 2009. Contains 167806 sequences.
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