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A221239 as a simple table

n a(n)
1 0
2 3913
3 2217402
4 1130617545
5 543708183481
6 258758829845879
7 122696503196445552
8 58120801668253857554 

[0,3913,2217402,1130617545,543708183481,
 258758829845879,122696503196445552,
 58120801668253857554]

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Last modified November 28 14:45 EST 2023. Contains 367419 sequences. (Running on oeis4.)