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A221120 as a simple table

n a(n)
1 1
2 21
3 4872
4 16436223
5 723234356389
6 429398881440049645

[1,21,4872,16436223,723234356389,
 429398881440049645]

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Last modified January 22 11:06 EST 2022. Contains 350481 sequences. (Running on oeis4.)