A057818
formatted as a simple table:
n
a(n)
1
0
2
1
3
6
4
33
5
108
6
345
7
1014
8
2865
9
7464
10
19791
11
51286
12
133249
[0,1,6,33,108,345,1014,2865,7464,19791,51286, 133249]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 4 12:48 EST 2009. Contains 170310 sequences.
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