A154107
formatted as a simple table:
n
a(n)
0
1
1
1
2
3
3
5
4
15
5
61
6
207
7
881
8
4491
9
21493
10
117543
11
710021
12
4166279
13
28107745
[1,1,3,5,15,61,207,881,4491,21493,117543,710021, 4166279,28107745]
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Maintained by
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(
njas@research.att.com
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Last modified December 5 20:25 EST 2009. Contains 170428 sequences.
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