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A055988 formatted as a simple table:

n a(n)
1 1
2 2
3 7
4 26
5 95
6 345
7 1252
8 4544
9 16493
10 59864
11 217286
12 788674
13 2862617
14 10390321
15 37713313
16 136886433
17 496850954
18 1803399103
19 6545722210
20 23758733815
21 86236081273
22 313007493212
23 1136110191472
24 4123691589365
25 14967590689568

[1,2,7,26,95,345,1252,4544,16493,59864,217286,
 788674,2862617,10390321,37713313,136886433,
 496850954,1803399103,6545722210,23758733815,
 86236081273,313007493212,1136110191472,
 4123691589365,14967590689568]

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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