A128065 - OEIS

A128065 as a simple table

n	a(n)
1	1
2	0
3	2
4	-1
5	2
6	3
7	-2
8	0
9	6
10	4
11	-3
12	-4
13	6
14	12
15	5
16	-4
17	-10
18	0
19	20
20	20
21	6
22	-5
23	-18
24	-15
25	20
26	45
27	30
28	7
29	-6
30	-28
31	-42
32	0
33	70
34	84
35	42
36	8
37	-7
38	-40
39	-84
40	-56
41	70
42	168
43	140
44	56
45	9
46	-8
47	-54
48	-144
49	-168
50	0
51	252
52	336
53	216
54	72
55	10

[1,0,2,-1,2,3,-2,0,6,4,-3,-4,6,12,5,-4,-10,0,20, 20,6,-5,-18,-15,20,45,30,7,-6,-28,-42,0,70,84,42, 8,-7,-40,-84,-56,70,168,140,56,9,-8,-54,-144,-168, 0,252,336,216,72,10]