A081105 - OEIS

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A081105 as a simple table

n	a(n)
0	1
1	6
2	35
3	200
4	1125
5	6250
6	34375
7	187500
8	1015625
9	5468750
10	29296875
11	156250000
12	830078125
13	4394531250
14	23193359375
15	122070312500
16	640869140625
17	3356933593750
18	17547607421875
19	91552734375000
20	476837158203125

[1,6,35,200,1125,6250,34375,187500,1015625, 5468750,29296875,156250000,830078125,4394531250, 23193359375,122070312500,640869140625, 3356933593750,17547607421875,91552734375000, 476837158203125]