A175138 - OEIS

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A175138 as a simple table

n	a(n)
1	3
2	5
3	15
4	225
5	50625
6	2562890625
7	6568408355712890625
8	43143988327398919500410556793212890625
9	1861403728794734215467410604755702820123364205073812627233564853668212890625

[3,5,15,225,50625,2562890625,6568408355712890625, 43143988327398919500410556793212890625, 18614037287947342154674106047557028201233642050738\ 12627233564853668212890625]