A128866 - OEIS

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A128866 as a simple table

n	a(n)
1	5
2	405
3	12005
4	253125
5	4617605
6	78764805
7	1300723205
8	21141253125
9	340920883205
10	5476114739205
11	87789257318405
12	1406000997253125
13	22507005033676805
14	360200017312153605
15	5763903867804057605

[5,405,12005,253125,4617605,78764805,1300723205, 21141253125,340920883205,5476114739205, 87789257318405,1406000997253125,22507005033676805, 360200017312153605,5763903867804057605]