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A145301 as a simple table

n a(n)
0 1
1 6
2 42
3 324
4 2628
5 21816
6 182952
7 1540944
8 13002768
9 109804896
10 927575712
11 7836761664
12 66213868608
13 559463573376
14 4727146822272
15 39941854665984
16 337487851323648
17 2851598575904256
18 24094547371141632
19 203586611176571904
20 1720202912984613888

[1,6,42,324,2628,21816,182952,1540944,13002768,
 109804896,927575712,7836761664,66213868608,
 559463573376,4727146822272,39941854665984,
 337487851323648,2851598575904256,
 24094547371141632,203586611176571904,
 1720202912984613888]

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Last modified April 25 23:48 EDT 2019. Contains 322465 sequences. (Running on oeis4.)