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A003425 formatted as a simple table:

n a(n)
0 1
1 1
2 6
3 114
4 5256
5 507720
6 93616560
7 30894489360
8 17407086641280
9 16152167106391680
10 23990233574783750400
11 55735096448700749203200 

[1,1,6,114,5256,507720,93616560,30894489360,
 17407086641280,16152167106391680,
 23990233574783750400,55735096448700749203200]

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.

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