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A000718 formatted as a simple table:

n a(n)
0 1
1 2
2 6
3 20
4 65
5 226
6 883
7 3947
8 20089
9 115036
10 732171
11 5126901
12 39165917
13 324138010
14 2888934623
15 27587288507
16 281001801969
17 3041152133848
18 34849036364659
19 421526126267265
20 5367037330561365
21 71752003756908550

[1,2,6,20,65,226,883,3947,20089,115036,732171,
 5126901,39165917,324138010,2888934623,27587288507,
 281001801969,3041152133848,34849036364659,
 421526126267265,5367037330561365,
 71752003756908550]

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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