A080507 - OEIS

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A080507 as a simple table

n	a(n)
1	1
2	5
3	37
4	252
5	202502
6	2595
7	3573588375003
8	2219710571718754
9	2188822879687504
10	29549108875781255
11	250366409274156575302546875005
12	5789291173553173247164869257812506

[1,5,37,252,202502,2595,3573588375003, 2219710571718754,2188822879687504, 29549108875781255,250366409274156575302546875005, 5789291173553173247164869257812506]