A167320 - OEIS

A167320 as a simple table

n	a(n)
1	1
2	-10
3	0
4	100
5	20
6	0
7	40
8	-1000
9	0
10	-200
11	80
12	0
13	100
14	-400
15	0
16	10000
17	140
18	0
19	160
20	2000
21	0
22	-800
23	200
24	0
25	400
26	-1000
27	0
28	4000
29	260
30	0
31	280
32	-100000
33	0
34	-1400
35	800
36	0
37	340
38	-1600
39	0
40	-20000
41	380
42	0
43	400
44	8000
45	0
46	-2000
47	440
48	0
49	1600
50	-4000
51	0
52	10000
53	500
54	0
55	1600

[1,-10,0,100,20,0,40,-1000,0,-200,80,0,100,-400,0, 10000,140,0,160,2000,0,-800,200,0,400,-1000,0, 4000,260,0,280,-100000,0,-1400,800,0,340,-1600,0, -20000,380,0,400,8000,0,-2000,440,0,1600,-4000,0, 10000,500,0,1600]