A182517 - OEIS

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A182517 as a simple table

n	a(n)
1	1
2	1
3	3
4	72
5	11423
6	11187798
7	65460885384
8	2247082682913972
9	447548280314975144427
10	513427482871084962707467332

[1,1,3,72,11423,11187798,65460885384, 2247082682913972,447548280314975144427, 513427482871084962707467332]