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A117808 as a simple table

n a(n)
1 3
2 13
3 181
4 2521
5 489061
6 6811741
7 1321442641
8 18405321661
9 381765135195632792959100810331957408101589361

[3,13,181,2521,489061,6811741,1321442641,
 18405321661,
 381765135195632792959100810331957408101589361]

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Last modified May 19 17:48 EDT 2019. Contains 323395 sequences. (Running on oeis4.)