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A166908 as a simple table

n a(n)
0 1
1 16
2 270
3 5148
4 110929
5 2677008
6 71648322
7 2107966432
8 67649839664
9 2352412120760
10 88122951915388
11 3538364803586104
12 151611580761978784
13 6905283671128114400
14 333151832685664811338
15 16973306740660778801468

[1,16,270,5148,110929,2677008,71648322,2107966432,
 67649839664,2352412120760,88122951915388,
 3538364803586104,151611580761978784,
 6905283671128114400,333151832685664811338,
 16973306740660778801468]

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Last modified December 20 15:43 EST 2014. Contains 252266 sequences.