A140723 - OEIS

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A140723 as a simple table

n	a(n)
1	1
2	1
3	-2
4	2
5	-4
6	4
7	-16
8	0
9	8
10	-16
11	16
12	-14
13	-80
14	-48
15	32
16	32
17	-64
18	64
19	32
20	0
21	-256
22	0
23	128
24	-256
25	-576
26	0
27	256
28	-912
29	608
30	1120
31	-1280
32	-1280
33	512
34	512

[1,1,-2,2,-4,4,-16,0,8,-16,16,-14,-80,-48,32,32, -64,64,32,0,-256,0,128,-256,-576,0,256,-912,608, 1120,-1280,-1280,512,512]