A071806 - OEIS

A071806 as a simple table

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

[0,0,0,0,2,2,2,2,2,3,3,4,4,4,4,4,5,6,7,7,7,8,9,9, 9,9,9,9,9,9,9,9,10,11,12,12,12,15,18,18,19,19,20, 20,20,20,20,20,20,21,21,22,22,23,23,23,23,23,23, 24,24,24,25,26,26,26,26,28,28,29,29,29,29,29,30, 31,31,31,31,31]

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

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

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