A094172
formatted as a simple table:
n
a(n)
0
0
1
0
2
0
3
21
4
390
5
3427
6
18380
7
73413
8
237459
9
659774
10
1629116
11
3666785
12
7651680
[0,0,0,21,390,3427,18380,73413,237459,659774, 1629116,3666785,7651680]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 6 22:55 EST 2009. Contains 170429 sequences.
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