A068728 - OEIS

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A068728 as a simple table

n	a(n)
1	1
2	7
3	925
4	3096791
5	251611610655
6	500885416261650533
7	24461989414349531084868443
8	29358790904767905695470325002387331

[1,7,925,3096791,251611610655,500885416261650533, 24461989414349531084868443, 29358790904767905695470325002387331]