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A021268 as a simple table

n a(n)
0 1
1 21
2 305
3 3825
4 44481
5 494721
6 5346625
7 56661825
8 592183361
9 6126355521
10 62899732545
11 642086748225
12 6525582872641
13 66093551865921
14 667637303808065
15 6729987319337025
16 67728787443552321
17 680719188437241921

[1,21,305,3825,44481,494721,5346625,56661825,
 592183361,6126355521,62899732545,642086748225,
 6525582872641,66093551865921,667637303808065,
 6729987319337025,67728787443552321,
 680719188437241921]

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Last modified August 10 12:39 EDT 2020. Contains 336379 sequences. (Running on oeis4.)