A089957
formatted as a simple table:
n
a(n)
0
1
1
20
2
400
3
1862
4
9825
5
53516
6
311642
7
2018993
8
12150635
9
69284509
[1,20,400,1862,9825,53516,311642,2018993,12150635, 69284509]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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