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A057818 formatted as a simple table:

n a(n)
1 0
2 1
3 6
4 33
5 108
6 345
7 1014
8 2865
9 7464
10 19791
11 51286
12 133249

[0,1,6,33,108,345,1014,2865,7464,19791,51286,
 133249]

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Last modified December 4 12:48 EST 2009. Contains 170310 sequences.


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