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A270473 as a simple table

n a(n)
0 1
1 4
2 36
3 324
4 2916
5 26244
6 236196
7 2125764
8 19131876
9 172186884
10 1549681956
11 13947137604
12 125524238436
13 1129718145924
14 10167463313316
15 91507169819844
16 823564528378596
17 7412080755407364
18 66708726798666276
19 600378541187996484
20 5403406870691968356

[1,4,36,324,2916,26244,236196,2125764,19131876,
 172186884,1549681956,13947137604,125524238436,
 1129718145924,10167463313316,91507169819844,
 823564528378596,7412080755407364,
 66708726798666276,600378541187996484,
 5403406870691968356]

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Last modified April 25 15:00 EDT 2024. Contains 371989 sequences. (Running on oeis4.)