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A115340 formatted as a simple table:

n a(n)
2 1
3 1
4 2
5 5
6 14
7 50
8 233
9 1248
10 7593
11 49536
12 339483
13 2404472
14 17468202
15 129459090
16 975647292
17 7458907217
18 57744122366
19 452028275567 

[1,1,2,5,14,50,233,1248,7593,49536,339483,2404472,
 17468202,129459090,975647292,7458907217,
 57744122366,452028275567]

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

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