A126758
formatted as a simple table:
n
a(n)
1
0
2
0
3
1
4
1
5
4
6
11
7
39
8
139
9
603
10
2925
11
16709
12
112054
13
888615
14
8321364
[0,0,1,1,4,11,39,139,603,2925,16709,112054,888615, 8321364]
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Maintained by
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(
njas@research.att.com
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.
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