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A007868 formatted as a simple table:

n a(n)
0 1
1 1
2 2
3 5
4 17
5 73
6 398
7 2636
8 20542
9 182750
10 1819148
11 19976248
12 239570876
13 3113794652
14 43590340840
15 653842358768
16 10461418047368
17 177843819947656

[1,1,2,5,17,73,398,2636,20542,182750,1819148,
 19976248,239570876,3113794652,43590340840,
 653842358768,10461418047368,177843819947656]

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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