A140440
formatted as a simple table:
n
a(n)
1
0
2
0
3
0
4
0
5
1
6
1
7
2
8
5
9
12
10
40
11
154
12
766
13
4672
14
34547
15
302185
16
3073267
17
35933851
[0,0,0,0,1,1,2,5,12,40,154,766,4672,34547,302185, 3073267,35933851]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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