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A054361 formatted as a simple table:

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 3
8 20
9 198
10 1390
11 9474
12 35488
13 178448
14 696371
15 2721544
16 10683110
17 41334494
18 155723774
19 596182769
20 2257379379
21 8587521496
22 32688629235
23 124568505590

[0,0,0,0,0,0,3,20,198,1390,9474,35488,178448,
 696371,2721544,10683110,41334494,155723774,
 596182769,2257379379,8587521496,32688629235,
 124568505590]

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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