A047237 - OEIS

A047237 as a simple table

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	7
7	8
8	10
9	12
10	13
11	14
12	16
13	18
14	19
15	20
16	22
17	24
18	25
19	26
20	28
21	30
22	31
23	32
24	34
25	36
26	37
27	38
28	40
29	42
30	43
31	44
32	46
33	48
34	49
35	50
36	52
37	54
38	55
39	56
40	58
41	60
42	61
43	62
44	64
45	66
46	67
47	68
48	70
49	72
50	73
51	74
52	76
53	78
54	79
55	80
56	82
57	84
58	85
59	86
60	88
61	90
62	91
63	92
64	94
65	96
66	97

[0,1,2,4,6,7,8,10,12,13,14,16,18,19,20,22,24,25, 26,28,30,31,32,34,36,37,38,40,42,43,44,46,48,49, 50,52,54,55,56,58,60,61,62,64,66,67,68,70,72,73, 74,76,78,79,80,82,84,85,86,88,90,91,92,94,96,97]

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	7
7	8
8	10
9	12
10	13
11	14
12	16
13	18
14	19
15	20
16	22
17	24
18	25
19	26
20	28
21	30
22	31
23	32
24	34
25	36
26	37
27	38
28	40
29	42
30	43
31	44
32	46
33	48
34	49
35	50
36	52
37	54
38	55
39	56
40	58
41	60
42	61
43	62
44	64
45	66
46	67
47	68
48	70
49	72
50	73
51	74
52	76
53	78
54	79
55	80
56	82
57	84
58	85
59	86
60	88
61	90
62	91
63	92
64	94
65	96
66	97

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	7
7	8
8	10
9	12
10	13
11	14
12	16
13	18
14	19
15	20
16	22
17	24
18	25
19	26
20	28
21	30
22	31
23	32
24	34
25	36
26	37
27	38
28	40
29	42
30	43
31	44
32	46
33	48
34	49
35	50
36	52
37	54
38	55
39	56
40	58
41	60
42	61
43	62
44	64
45	66
46	67
47	68
48	70
49	72
50	73
51	74
52	76
53	78
54	79
55	80
56	82
57	84
58	85
59	86
60	88
61	90
62	91
63	92
64	94
65	96
66	97

n	a(n)
1	0
2	1
3	2
4	4
5	6
6	7
7	8
8	10
9	12
10	13
11	14
12	16
13	18
14	19
15	20
16	22
17	24
18	25
19	26
20	28
21	30
22	31
23	32
24	34
25	36
26	37
27	38
28	40
29	42
30	43
31	44
32	46
33	48
34	49
35	50
36	52
37	54
38	55
39	56
40	58
41	60
42	61
43	62
44	64
45	66
46	67
47	68
48	70
49	72
50	73
51	74
52	76
53	78
54	79
55	80
56	82
57	84
58	85
59	86
60	88
61	90
62	91
63	92
64	94
65	96
66	97