A280735 - OEIS

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A280735 as a simple table

n	a(n)
1	1
2	3
3	4
4	125
5	225
6	84035
7	2458624
8	162030456
9	8930250000
10	92844190333125
11	9001015156742400
12	942951673566712781829
13	68987440762943255933340961
14	14018304328535759323100326171875
15	377177413291384771899817984000000

[1,3,4,125,225,84035,2458624,162030456,8930250000, 92844190333125,9001015156742400, 942951673566712781829,68987440762943255933340961, 14018304328535759323100326171875, 377177413291384771899817984000000]