A052562 - OEIS

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A052562 as a simple table

n	a(n)
0	1
1	5
2	50
3	750
4	15000
5	375000
6	11250000
7	393750000
8	15750000000
9	708750000000
10	35437500000000
11	1949062500000000
12	116943750000000000
13	7601343750000000000
14	532094062500000000000
15	39907054687500000000000

[1,5,50,750,15000,375000,11250000,393750000, 15750000000,708750000000,35437500000000, 1949062500000000,116943750000000000, 7601343750000000000,532094062500000000000, 39907054687500000000000]