A307872 - OEIS

A307872 as a simple table

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	4
7	5
8	7
9	11
10	13
11	17
12	23
13	27
14	33
15	42
16	48
17	57
18	69
19	78
20	90
21	106
22	118
23	134
24	154
25	170
26	190
27	215
28	235
29	260
30	290
31	315
32	345
33	381
34	411
35	447
36	489
37	525
38	567
39	616
40	658
41	707
42	763
43	812
44	868
45	932
46	988
47	1052
48	1124
49	1188
50	1260
51	1341
52	1413
53	1494
54	1584
55	1665

[0,0,1,1,2,4,5,7,11,13,17,23,27,33,42,48,57,69,78, 90,106,118,134,154,170,190,215,235,260,290,315, 345,381,411,447,489,525,567,616,658,707,763,812, 868,932,988,1052,1124,1188,1260,1341,1413,1494, 1584,1665]