A009528 - OEIS

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A009528 as a simple table

n	a(n)
0	0
1	1
2	2
3	0
4	-16
5	-68
6	-88
7	784
8	4608
9	-9008
10	-161248
11	625152
12	14608640
13	-8998208
14	-1347816832
15	-2920147712
16	139368775680
17	708078508288
18	-17610019700224
19	-166304331522048
20	2430929524011008
21	40722499309345792

[0,1,2,0,-16,-68,-88,784,4608,-9008,-161248, 625152,14608640,-8998208,-1347816832,-2920147712, 139368775680,708078508288,-17610019700224, -166304331522048,2430929524011008, 40722499309345792]