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A129556 formatted as a simple table:

n a(n)
1 0
2 2
3 21
4 95
5 816
6 3626
7 31005
8 137711
9 1177392
10 5229410
11 44709909
12 198579887
13 1697799168
14 7540806314
15 64471658493
16 286352060063
17 2448225223584
18 10873837476098
19 92968086837717
20 412919472031679
21 3530339074609680

[0,2,21,95,816,3626,31005,137711,1177392,5229410,
 44709909,198579887,1697799168,7540806314,
 64471658493,286352060063,2448225223584,
 10873837476098,92968086837717,412919472031679,
 3530339074609680]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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