A247973 - OEIS

A247973 as a simple table

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

[1,1,2,3,4,5,5,6,7,8,9,9,10,11,12,12,13,14,15,16, 16,17,18,19,20,20,21,22,23,23,24,25,26,27,27,28, 29,30,31,31,32,33,34,34,35,36,37,38,38,39,40,41, 41,42,43,44,45,45,46,47,48,49,49,50,51,52,52,53]

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

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

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