A393986 - OEIS

A393986 as a simple table

n	a(n)
1	0
2	0
3	0
4	1
5	1
6	2
7	2
8	4
9	4
10	6
11	7
12	11
13	13
14	15
15	19
16	25
17	30
18	36
19	43
20	52
21	62
22	74
23	88
24	105
25	122
26	143
27	168
28	196
29	228
30	264
31	307
32	354
33	408
34	468
35	537
36	616
37	705
38	803
39	916
40	1043
41	1185
42	1343
43	1521
44	1719
45	1943
46	2192
47	2471
48	2783
49	3126
50	3509
51	3937
52	4411
53	4937
54	5520
55	6167
56	6883
57	7677

[0,0,0,1,1,2,2,4,4,6,7,11,13,15,19,25,30,36,43,52, 62,74,88,105,122,143,168,196,228,264,307,354,408, 468,537,616,705,803,916,1043,1185,1343,1521,1719, 1943,2192,2471,2783,3126,3509,3937,4411,4937,5520, 6167,6883,7677]