A053906
formatted as a simple table:
n
a(n)
1
1
2
4
3
26
4
131
5
276
6
881
7
3431
8
81346
9
81619
10
129119
11
132954
12
1292931424
[1,4,26,131,276,881,3431,81346,81619,129119, 132954,1292931424]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
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