A231991 - OEIS

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A231991 as a simple table

n	a(n)
1	4
2	32
3	1024
4	80511
5	15594601
6	9716967198
7	17330552348004
8	86052358301456560
9	1193370539733163272100
10	47736311347811120780540634
11	5427560264549933547128560973449
12	1747506522236821289436659004322720324

[4,32,1024,80511,15594601,9716967198, 17330552348004,86052358301456560, 1193370539733163272100,47736311347811120780540634, 5427560264549933547128560973449, 1747506522236821289436659004322720324]