A054645 - OEIS

A054645 as a simple table

n	a(n)
3	0
4	0
5	2
6	6
7	10
8	10
9	6
10	2
11	0
12	0
13	0
14	1
15	10
16	63
17	207
18	525
19	954
20	1395
21	1550
22	1395
23	954
24	525
25	207
26	63
27	10
28	1
29	0
30	0
31	1
32	28
33	258
34	1503
35	6475
36	21810
37	59540
38	134333
39	254178
40	407040
41	555356
42	648054
43	648054
44	555356
45	407040
46	254178
47	134333
48	59540
49	21810
50	6475

[0,0,2,6,10,10,6,2,0,0,0,1,10,63,207,525,954,1395, 1550,1395,954,525,207,63,10,1,0,0,1,28,258,1503, 6475,21810,59540,134333,254178,407040,555356, 648054,648054,555356,407040,254178,134333,59540, 21810,6475]