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A220620 as a simple table

n a(n)
1 21
2 4565
3 624227
4 93905509
5 13864972277
6 2054706174413
7 304265433695569
8 45062687311719797
9 6673721691080067317
10 988374130647554935157
11 146377412047334158410357
12 21678380394232186381827093

[21,4565,624227,93905509,13864972277,
 2054706174413,304265433695569,45062687311719797,
 6673721691080067317,988374130647554935157,
 146377412047334158410357,
 21678380394232186381827093]

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Last modified May 18 02:30 EDT 2022. Contains 353779 sequences. (Running on oeis4.)