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A126480 formatted as a simple table:

n a(n)
0 1
1 12
2 72
3 448
4 2816
5 17780
6 112440
7 711504
8 4503320
9 28505304
10 180439880
11 1142206528
12 7230339936
13 45769222384
14 289726772704
15 1834018988272
16 11609648360160
17 73491027329888
18 465210573030272
19 2944861245639136

[1,12,72,448,2816,17780,112440,711504,4503320,
 28505304,180439880,1142206528,7230339936,
 45769222384,289726772704,1834018988272,
 11609648360160,73491027329888,465210573030272,
 2944861245639136]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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