A063201 - OEIS

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A063201 as a simple table

n	a(n)
1	0
2	1
3	3
4	2
5	4
6	5
7	5
8	6
9	8
10	7
11	9
12	10
13	10
14	11
15	13
16	12
17	14
18	15
19	15
20	16
21	18
22	17
23	19
24	20
25	20
26	21
27	23
28	22
29	24
30	25
31	25
32	26
33	28
34	27
35	29
36	30
37	30
38	31
39	33
40	32
41	34
42	35
43	35
44	36
45	38
46	37
47	39
48	40
49	40
50	41

[0,1,3,2,4,5,5,6,8,7,9,10,10,11,13,12,14,15,15,16, 18,17,19,20,20,21,23,22,24,25,25,26,28,27,29,30, 30,31,33,32,34,35,35,36,38,37,39,40,40,41]