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A141381 formatted as a simple table:

n a(n)
1 1
2 1
3 4
4 26
5 202
6 1786
7 17296
8 179826
9 1980484
10 22895120
11 276005616
12 3452880648
13 44660161656
14 595491975516
15 8166748417744
16 114983040461254
17 1659471907641924
18 24519436191927936
19 370506958317854776

[1,1,4,26,202,1786,17296,179826,1980484,22895120,
 276005616,3452880648,44660161656,595491975516,
 8166748417744,114983040461254,1659471907641924,
 24519436191927936,370506958317854776]

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


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