A165225 - OEIS

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A165225 as a simple table

n	a(n)
0	1
1	5
2	45
3	425
4	4025
5	38125
6	361125
7	3420625
8	32400625
9	306903125
10	2907028125
11	27535765625
12	260822515625
13	2470546328125
14	23401350703125
15	221660775390625
16	2099601000390625
17	19887706126953125
18	188379056267578125

[1,5,45,425,4025,38125,361125,3420625,32400625, 306903125,2907028125,27535765625,260822515625, 2470546328125,23401350703125,221660775390625, 2099601000390625,19887706126953125, 188379056267578125]