A109401 - OEIS

A109401 as a simple table

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

[0,1,1,2,3,4,4,5,6,7,8,9,9,10,11,11,12,13,14,15, 15,16,17,17,18,19,20,21,22,23,23,24,25,25,26,26, 27,28,29,30,31,32,32,33,34,34,35,35,36,37,38,39, 40,41,42,43,43,44,45,45,46,46,47,47,48,49,50,51]

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

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

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