A007412 - OEIS

A007412 as a simple table

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

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

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

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

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