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A058800 formatted as a simple table:

n a(n)
0 1
1 1
2 1
3 0
4 1
5 2
6 7
7 27
8 126
9 664
10 3954
11 26190
12 190754
13 1514332
14 12998035
15 119803771
16 1178740932
17 12316480222
18 136060611189

[1,1,1,0,1,2,7,27,126,664,3954,26190,190754,
 1514332,12998035,119803771,1178740932,12316480222,
 136060611189]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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