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A145952 formatted as a simple table:

n a(n)
1 1
2 1
3 9
4 33
5 333
6 7127
7 205501
8 11166945
9 1122739259
10 190153543115
11 56969419979245
12 30406497496961445
13 28371939730808217655

[1,1,9,33,333,7127,205501,11166945,1122739259,
 190153543115,56969419979245,30406497496961445,
 28371939730808217655]

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


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