A117681 - OEIS

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A117681 as a simple table

n	a(n)
1	2
2	54
3	8103
4	8886110
5	72004899337
6	4311231547115195
7	1907346572495099690525
8	6235149080811616882909238708
9	150609731458503054835259413016767498
10	26881171418161354484126255515800135873611118

[2,54,8103,8886110,72004899337,4311231547115195, 1907346572495099690525, 6235149080811616882909238708, 150609731458503054835259413016767498, 26881171418161354484126255515800135873611118]