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A000717 formatted as a simple table:

n a(n)
1 1
2 1
3 1
4 3
5 6
6 24
7 148
8 1646
9 34040
10 1358852
11 106321628
12 16006173014
13 4525920859198
14 2404130854745735
15 2426376196165902704 

[1,1,1,3,6,24,148,1646,34040,1358852,106321628,
 16006173014,4525920859198,2404130854745735,
 2426376196165902704]

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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