A111901 - OEIS

A111901 as a simple table

n	a(n)
0	1
1	0
2	1
3	1
4	2
5	2
6	3
7	4
8	5
9	7
10	8
11	11
12	13
13	17
14	20
15	25
16	30
17	37
18	44
19	53
20	63
21	75
22	89
23	105
24	123
25	145
26	169
27	197
28	229
29	266
30	307
31	355
32	408
33	469
34	538
35	615
36	703
37	801
38	912
39	1035
40	1175
41	1330
42	1504
43	1698
44	1914
45	2155
46	2423
47	2721
48	3051
49	3418
50	3824
51	4273
52	4770
53	5319
54	5925

[1,0,1,1,2,2,3,4,5,7,8,11,13,17,20,25,30,37,44,53, 63,75,89,105,123,145,169,197,229,266,307,355,408, 469,538,615,703,801,912,1035,1175,1330,1504,1698, 1914,2155,2423,2721,3051,3418,3824,4273,4770,5319, 5925]