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A126932 formatted as a simple table:

n a(n)
0 1
1 4
2 15
3 55
4 199
5 714
6 2547
7 9048
8 32043
9 113212
10 399265
11 1406079
12 4946137
13 17383162
14 61048359
15 214270215
16 7516918811
17 2636004228
18 9240836733
19 32386215971

[1,4,15,55,199,714,2547,9048,32043,113212,399265,
 1406079,4946137,17383162,61048359,214270215,
 7516918811,2636004228,9240836733,32386215971]

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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