A002180 - OEIS

A002180 as a simple table

n	a(n)
2	1
3	2
4	3
5	4
6	5
7	6
8	8
9	9
10	10
11	11
12	12
13	14
14	15
15	16
16	18
17	20
18	21
19	22
20	23
21	24
22	26
23	27
24	28
25	29
26	30
27	32
28	33
29	35
30	36
31	39
32	40
33	41
34	42
35	44
36	46
37	48
38	50
39	51
40	52
41	53
42	54
43	55
44	56
45	58
46	60
47	63
48	64
49	65
50	66
51	68
52	69
53	70
54	72
55	74
56	75
57	78
58	80
59	81
60	82
61	83
62	84
63	86
64	88
65	89
66	90
67	92

[1,2,3,4,5,6,8,9,10,11,12,14,15,16,18,20,21,22,23, 24,26,27,28,29,30,32,33,35,36,39,40,41,42,44,46, 48,50,51,52,53,54,55,56,58,60,63,64,65,66,68,69, 70,72,74,75,78,80,81,82,83,84,86,88,89,90,92]

n	a(n)
2	1
3	2
4	3
5	4
6	5
7	6
8	8
9	9
10	10
11	11
12	12
13	14
14	15
15	16
16	18
17	20
18	21
19	22
20	23
21	24
22	26
23	27
24	28
25	29
26	30
27	32
28	33
29	35
30	36
31	39
32	40
33	41
34	42
35	44
36	46
37	48
38	50
39	51
40	52
41	53
42	54
43	55
44	56
45	58
46	60
47	63
48	64
49	65
50	66
51	68
52	69
53	70
54	72
55	74
56	75
57	78
58	80
59	81
60	82
61	83
62	84
63	86
64	88
65	89
66	90
67	92

n	a(n)
2	1
3	2
4	3
5	4
6	5
7	6
8	8
9	9
10	10
11	11
12	12
13	14
14	15
15	16
16	18
17	20
18	21
19	22
20	23
21	24
22	26
23	27
24	28
25	29
26	30
27	32
28	33
29	35
30	36
31	39
32	40
33	41
34	42
35	44
36	46
37	48
38	50
39	51
40	52
41	53
42	54
43	55
44	56
45	58
46	60
47	63
48	64
49	65
50	66
51	68
52	69
53	70
54	72
55	74
56	75
57	78
58	80
59	81
60	82
61	83
62	84
63	86
64	88
65	89
66	90
67	92

n	a(n)
2	1
3	2
4	3
5	4
6	5
7	6
8	8
9	9
10	10
11	11
12	12
13	14
14	15
15	16
16	18
17	20
18	21
19	22
20	23
21	24
22	26
23	27
24	28
25	29
26	30
27	32
28	33
29	35
30	36
31	39
32	40
33	41
34	42
35	44
36	46
37	48
38	50
39	51
40	52
41	53
42	54
43	55
44	56
45	58
46	60
47	63
48	64
49	65
50	66
51	68
52	69
53	70
54	72
55	74
56	75
57	78
58	80
59	81
60	82
61	83
62	84
63	86
64	88
65	89
66	90
67	92