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A001277 formatted as a simple table:

n a(n)
2 1
3 3
4 12
5 56
6 321
7 2175
8 17008
9 150504
10 1485465
11 16170035
12 192384876
13 2483177808
14 34554278857
15 515620794591
16 8212685046336

[1,3,12,56,321,2175,17008,150504,1485465,16170035,
 192384876,2483177808,34554278857,515620794591,
 8212685046336]

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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