A304683 - OEIS

A304683 as a simple table

n	a(n)
1	0
2	0
3	2
4	2
5	2
6	3
7	5
8	5
9	6
10	7
11	7
12	7
13	7
14	7
15	8
16	8
17	9
18	10
19	12
20	12
21	13
22	14
23	14
24	15
25	15
26	16
27	17
28	17
29	18
30	18
31	18
32	18
33	22
34	24
35	25
36	26
37	27
38	29
39	30
40	30
41	30
42	31
43	32
44	33
45	33
46	33
47	33
48	35
49	35
50	35
51	35
52	35
53	35
54	35
55	35
56	37
57	37
58	37
59	37
60	37
61	37
62	39
63	39
64	39
65	44
66	47
67	52
68	52
69	54
70	55
71	57
72	60
73	63
74	66
75	68
76	69
77	69
78	70
79	70
80	71
81	72
82	72

[0,0,2,2,2,3,5,5,6,7,7,7,7,7,8,8,9,10,12,12,13,14, 14,15,15,16,17,17,18,18,18,18,22,24,25,26,27,29, 30,30,30,31,32,33,33,33,33,35,35,35,35,35,35,35, 35,37,37,37,37,37,37,39,39,39,44,47,52,52,54,55, 57,60,63,66,68,69,69,70,70,71,72,72]

n	a(n)
1	0
2	0
3	2
4	2
5	2
6	3
7	5
8	5
9	6
10	7
11	7
12	7
13	7
14	7
15	8
16	8
17	9
18	10
19	12
20	12
21	13
22	14
23	14
24	15
25	15
26	16
27	17
28	17
29	18
30	18
31	18
32	18
33	22
34	24
35	25
36	26
37	27
38	29
39	30
40	30
41	30
42	31
43	32
44	33
45	33
46	33
47	33
48	35
49	35
50	35
51	35
52	35
53	35
54	35
55	35
56	37
57	37
58	37
59	37
60	37
61	37
62	39
63	39
64	39
65	44
66	47
67	52
68	52
69	54
70	55
71	57
72	60
73	63
74	66
75	68
76	69
77	69
78	70
79	70
80	71
81	72
82	72

n	a(n)
1	0
2	0
3	2
4	2
5	2
6	3
7	5
8	5
9	6
10	7
11	7
12	7
13	7
14	7
15	8
16	8
17	9
18	10
19	12
20	12
21	13
22	14
23	14
24	15
25	15
26	16
27	17
28	17
29	18
30	18
31	18
32	18
33	22
34	24
35	25
36	26
37	27
38	29
39	30
40	30
41	30
42	31
43	32
44	33
45	33
46	33
47	33
48	35
49	35
50	35
51	35
52	35
53	35
54	35
55	35
56	37
57	37
58	37
59	37
60	37
61	37
62	39
63	39
64	39
65	44
66	47
67	52
68	52
69	54
70	55
71	57
72	60
73	63
74	66
75	68
76	69
77	69
78	70
79	70
80	71
81	72
82	72

n	a(n)
1	0
2	0
3	2
4	2
5	2
6	3
7	5
8	5
9	6
10	7
11	7
12	7
13	7
14	7
15	8
16	8
17	9
18	10
19	12
20	12
21	13
22	14
23	14
24	15
25	15
26	16
27	17
28	17
29	18
30	18
31	18
32	18
33	22
34	24
35	25
36	26
37	27
38	29
39	30
40	30
41	30
42	31
43	32
44	33
45	33
46	33
47	33
48	35
49	35
50	35
51	35
52	35
53	35
54	35
55	35
56	37
57	37
58	37
59	37
60	37
61	37
62	39
63	39
64	39
65	44
66	47
67	52
68	52
69	54
70	55
71	57
72	60
73	63
74	66
75	68
76	69
77	69
78	70
79	70
80	71
81	72
82	72