A261770 - OEIS

A261770 as a simple table

n	a(n)
0	1
1	1
2	1
3	2
4	2
5	3
6	3
7	4
8	5
9	6
10	8
11	9
12	11
13	13
14	16
15	19
16	22
17	26
18	30
19	35
20	41
21	47
22	55
23	63
24	73
25	84
26	96
27	110
28	125
29	143
30	162
31	184
32	208
33	235
34	266
35	300
36	338
37	380
38	427
39	479
40	536
41	600
42	670
43	748
44	834
45	929
46	1034
47	1149
48	1277
49	1417
50	1571
51	1740
52	1925
53	2129
54	2351
55	2596
56	2863

[1,1,1,2,2,3,3,4,5,6,8,9,11,13,16,19,22,26,30,35, 41,47,55,63,73,84,96,110,125,143,162,184,208,235, 266,300,338,380,427,479,536,600,670,748,834,929, 1034,1149,1277,1417,1571,1740,1925,2129,2351,2596, 2863]