A128787 - OEIS

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A128787 as a simple table

n	a(n)
0	0
1	8
2	256
3	4608
4	65536
5	819200
6	9437184
7	102760448
8	1073741824
9	10871635968
10	107374182400
11	1039382085632
12	9895604649984
13	92908732547072
14	862017116176384
15	7916483719987200
16	72057594037927936
17	650770146155036672

[0,8,256,4608,65536,819200,9437184,102760448, 1073741824,10871635968,107374182400,1039382085632, 9895604649984,92908732547072,862017116176384, 7916483719987200,72057594037927936, 650770146155036672]