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A293720 as a simple table

n a(n)
0 1
1 1
2 9
3 25
4 241
5 1041
6 10681
7 60649
8 658785
9 4540321
10 51972841
11 415198521
12 4988808529
13 44847866545
14 563683953561
15 5586645006601
16 73228719433921
17 788319280278849
18 10747425123292105
19 124265401483446361
20 1757874020223846321
21 21640338257575264081

[1,1,9,25,241,1041,10681,60649,658785,4540321,
 51972841,415198521,4988808529,44847866545,
 563683953561,5586645006601,73228719433921,
 788319280278849,10747425123292105,
 124265401483446361,1757874020223846321,
 21640338257575264081]

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Last modified October 16 12:23 EDT 2021. Contains 348041 sequences. (Running on oeis4.)