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A007717 formatted as a simple table:

n a(n)
1 2
2 7
3 23
4 79
5 274
6 1003
7 3763
8 14723
9 59663
10 250738
11 1090608
12 4905430
13 22777420
14 109040012
15 537401702

[2,7,23,79,274,1003,3763,14723,59663,250738,
 1090608,4905430,22777420,109040012,537401702]

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


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