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A220999 as a simple table

n a(n)
1 21
2 2989
3 394580
4 51672851
5 6758547145
6 883809591160
7 115571009291599
8 15112491898694315
9 1976162121051496204
10 258409744432367037405
11 33790541796768618273627
12 4418566652828051992947794 

[21,2989,394580,51672851,6758547145,883809591160,
 115571009291599,15112491898694315,
 1976162121051496204,258409744432367037405,
 33790541796768618273627,4418566652828051992947794]

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)