A054363
formatted as a simple table:
n
a(n)
0
1
1
1
2
5
3
15
4
85
5
510
6
4051
7
33130
8
291925
9
2661255
10
25059670
11
241724380
12
2379912355
[1,1,5,15,85,510,4051,33130,291925,2661255, 25059670,241724380,2379912355]
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(
njas@research.att.com
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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.
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