A393405 - OEIS

A393405 as a simple table

n	a(n)
0	0
1	0
2	0
3	1
4	1
5	3
6	3
7	6
8	6
9	13
10	13
11	22
12	22
13	33
14	33
15	51
16	51
17	72
18	72
19	96
20	96
21	130
22	130
23	168
24	168
25	210
26	210
27	265
28	265
29	325
30	325
31	390
32	390
33	471
34	471
35	558
36	558
37	651
38	651
39	763
40	763
41	882
42	882
43	1008
44	1008
45	1156
46	1156
47	1312
48	1312
49	1476
50	1476
51	1665
52	1665
53	1863
54	1863
55	2070
56	2070
57	2305
58	2305
59	2550
60	2550
61	2805
62	2805
63	3091
64	3091
65	3388
66	3388

[0,0,0,1,1,3,3,6,6,13,13,22,22,33,33,51,51,72,72, 96,96,130,130,168,168,210,210,265,265,325,325,390, 390,471,471,558,558,651,651,763,763,882,882,1008, 1008,1156,1156,1312,1312,1476,1476,1665,1665,1863, 1863,2070,2070,2305,2305,2550,2550,2805,2805,3091, 3091,3388,3388]