A020892 - OEIS

A020892 as a simple table

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

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

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

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

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