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A113179 formatted as a simple table:

n a(n)
0 1
1 2
2 4
3 12
4 40
5 128
6 408
7 1328
8 4384
9 14560
10 48576
11 162816
12 547936
13 1850048
14 6263680
15 21257856
16 72298240
17 246345728
18 840775424
19 2873802240
20 9835840512
21 33704557568
22 115622041600
23 397032488960
24 1364610270720
25 4694145256448

[1,2,4,12,40,128,408,1328,4384,14560,48576,162816,
 547936,1850048,6263680,21257856,72298240,
 246345728,840775424,2873802240,9835840512,
 33704557568,115622041600,397032488960,
 1364610270720,4694145256448]

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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