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A144924 formatted as a simple table:

n a(n)
1 1
2 2
3 4
4 13
5 36
6 126
7 428
8 1681
9 6820
10 29233
11 127865
12 592604
13 2829477
14 14118079
15 72122117
16 380843081
17 2056927326
18 11444517369
19 65234523659
20 380644223976
21 2272831229113
22 13857568536672
23 86164285623173
24 546196787212398

[1,2,4,13,36,126,428,1681,6820,29233,127865,
 592604,2829477,14118079,72122117,380843081,
 2056927326,11444517369,65234523659,380644223976,
 2272831229113,13857568536672,86164285623173,
 546196787212398]

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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