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A220146 as a simple table

n a(n)
1 3
2 11
3 77
4 1174
5 34959
6 3057777
7 822242009
8 671848868714

[3,11,77,1174,34959,3057777,822242009,
 671848868714]

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Last modified December 1 07:48 EST 2023. Contains 367468 sequences. (Running on oeis4.)