A156965 - OEIS

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A156965 as a simple table

n	a(n)
0	1
1	50
2	625
3	62500
4	390625
5	19531250
6	244140625
7	48828125000
8	152587890625
9	7629394531250
10	95367431640625
11	9536743164062500
12	59604644775390625
13	2980232238769531250
14	37252902984619140625
15	14901161193847656250000

[1,50,625,62500,390625,19531250,244140625, 48828125000,152587890625,7629394531250, 95367431640625,9536743164062500,59604644775390625, 2980232238769531250,37252902984619140625, 14901161193847656250000]