A154108
formatted as a simple table:
n
a(n)
1
1
2
0
3
2
4
7
5
27
6
114
7
523
8
2589
9
13744
10
77821
11
467767
12
2972432
13
19895813
14
139824045
[1,0,2,7,27,114,523,2589,13744,77821,467767, 2972432,19895813,139824045]
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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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