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A129151 formatted as a simple table:

n a(n)
0 81
1 108
2 216
3 540
4 1188
5 2484
6 5076
7 10260
8 23112
9 57996
10 135648
11 475632
12 1586736
13 4760640
14 20409408
15 89259840
16 374899968 

[81,108,216,540,1188,2484,5076,10260,23112,57996,
 135648,475632,1586736,4760640,20409408,89259840,
 374899968]

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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