A206406 - OEIS

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A206406 as a simple table

n	a(n)
1	81
2	5199
3	2073999
4	4099250889
5	38883964087761
6	1772313933215113017
7	388756746462491144596125
8	410796134340987248242931767083
9	2092643007412378548348442168950591087

[81,5199,2073999,4099250889,38883964087761, 1772313933215113017,388756746462491144596125, 410796134340987248242931767083, 2092643007412378548348442168950591087]