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A002218 formatted as a simple table:

n a(n)
1 0
2 1
3 1
4 3
5 10
6 56
7 468
8 7123
9 194066
10 9743542
11 900969091
12 153620333545
13 48432939150704
14 28361824488394169
15 30995890806033380784
16 63501635429109597504951
17 244852079292073376010411280
18 1783160594069429925952824734641
19 24603887051350945867492816663958981

[0,1,1,3,10,56,468,7123,194066,9743542,900969091,
 153620333545,48432939150704,28361824488394169,
 30995890806033380784,63501635429109597504951,
 244852079292073376010411280,
 1783160594069429925952824734641,
 24603887051350945867492816663958981]

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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