A069965 - OEIS

A069965 as a simple table

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	30
12	210
13	780
14	2100
15	4650
16	9030
17	15960
18	26280
19	40950
20	0
21	210
22	960
23	2850
24	6720
25	13650
26	24960
27	42210
28	67200
29	101970
30	0
31	780
32	2850
33	7290
34	15540
35	29400
36	51030
37	82950
38	128040
39	189540
40	0
41	2100
42	6720
43	15540
44	30720
45	54900

[0,0,0,0,0,0,0,0,0,0,0,30,210,780,2100,4650,9030, 15960,26280,40950,0,210,960,2850,6720,13650,24960, 42210,67200,101970,0,780,2850,7290,15540,29400, 51030,82950,128040,189540,0,2100,6720,15540,30720, 54900]