A129424 - OEIS

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A129424 as a simple table

n	a(n)
1	1
2	8
3	271
4	90913
5	165134083
6	861889423083
7	10352781874872853
8	253226977418079364874
9	11542716741789258789499297
10	915461016322959135074642849828

[1,8,271,90913,165134083,861889423083, 10352781874872853,253226977418079364874, 11542716741789258789499297, 915461016322959135074642849828]