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A026592 formatted as a simple table:

n a(n)
2 1
3 3
4 14
5 65
6 251
7 1288
8 4830
9 25518
10 95388
11 510532
12 1910821
13 10309234
14 38656462
15 209766714
16 787912030
17 4294635438
18 16155375825 

[1,3,14,65,251,1288,4830,25518,95388,510532,
 1910821,10309234,38656462,209766714,787912030,
 4294635438,16155375825]

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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