A006142
formatted as a simple table:
n
a(n)
4
0
5
0
6
0
7
0
8
0
9
1
10
0
11
1
12
7
13
17
14
30
15
49
16
124
17
321
18
761
19
1721
20
3815
[0,0,0,0,0,1,0,1,7,17,30,49,124,321,761,1721,3815]
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Maintained by
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(
njas@research.att.com
)
Last modified December 16 17:18 EST 2009. Contains 170825 sequences.
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