A081084 - OEIS

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A081084 as a simple table

n	a(n)
1	8
2	48
3	224
4	960
5	65024
6	261120
7	1046528
8	4190208
9	268402688
10	1073676288
11	4294836224
12	17179607040
13	70368727400448
14	4503599493152768
15	18014398241046528
16	72057593501057024
17	288230375077969920

[8,48,224,960,65024,261120,1046528,4190208, 268402688,1073676288,4294836224,17179607040, 70368727400448,4503599493152768,18014398241046528, 72057593501057024,288230375077969920]