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A001908 formatted as a simple table:

n a(n)
0 1
1 4
2 41
3 614
4 12281
5 307024
6 9210721
7 322375234
8 12895009361
9 580275421244
10 29013771062201
11 1595757408421054
12 95745444505263241 

[1,4,41,614,12281,307024,9210721,322375234,
 12895009361,580275421244,29013771062201,
 1595757408421054,95745444505263241]

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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