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A052814 formatted as a simple table:

n a(n)
0 0
1 1
2 1
3 2
4 6
5 16
6 49
7 156
8 511
9 1723
10 5942
11 20817
12 73938
13 265611
14 963225
15 3521667
16 12966696
17 48037862
18 178936340
19 669748197
20 2517688316 

[0,1,1,2,6,16,49,156,511,1723,5942,20817,73938,
 265611,963225,3521667,12966696,48037862,178936340,
 669748197,2517688316]

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

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