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A144690 formatted as a simple table:

n a(n)
0 1
1 2
2 6
3 16
4 130
5 636
6 5712
7 34336
8 811458
9 7151380
10 113034746
11 1049982792
12 25276020640
13 293841338896
14 5276545467000
15 61852739170176 

[1,2,6,16,130,636,5712,34336,811458,7151380,
 113034746,1049982792,25276020640,293841338896,
 5276545467000,61852739170176]

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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