A220440 - OEIS

A220440 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	30
11	30
12	42
13	42
14	70
15	105
16	105
17	105
18	110
19	165
20	165
21	231
22	231
23	385
24	385
25	455
26	455
27	455
28	455
29	715
30	715
31	1001
32	1001
33	1001
34	1001
35	1309
36	1309
37	1547
38	1547
39	1729
40	1729
41	2431
42	2431
43	2717
44	2717
45	2717
46	2717
47	3553
48	3553
49	4199
50	4199

[0,0,0,0,0,0,0,0,0,30,30,42,42,70,105,105,105,110, 165,165,231,231,385,385,455,455,455,455,715,715, 1001,1001,1001,1001,1309,1309,1547,1547,1729,1729, 2431,2431,2717,2717,2717,2717,3553,3553,4199,4199]