A047517 - OEIS

A047517 as a simple table

n	a(n)
1	0
2	1
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	14
12	15
13	16
14	17
15	19
16	20
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	38
30	39
31	40
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	54
42	55
43	56
44	57
45	59
46	60
47	62
48	63
49	64
50	65
51	67
52	68
53	70
54	71
55	72
56	73
57	75
58	76
59	78
60	79
61	80
62	81
63	83
64	84
65	86
66	87
67	88
68	89

[0,1,3,4,6,7,8,9,11,12,14,15,16,17,19,20,22,23,24, 25,27,28,30,31,32,33,35,36,38,39,40,41,43,44,46, 47,48,49,51,52,54,55,56,57,59,60,62,63,64,65,67, 68,70,71,72,73,75,76,78,79,80,81,83,84,86,87,88, 89]

n	a(n)
1	0
2	1
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	14
12	15
13	16
14	17
15	19
16	20
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	38
30	39
31	40
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	54
42	55
43	56
44	57
45	59
46	60
47	62
48	63
49	64
50	65
51	67
52	68
53	70
54	71
55	72
56	73
57	75
58	76
59	78
60	79
61	80
62	81
63	83
64	84
65	86
66	87
67	88
68	89

n	a(n)
1	0
2	1
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	14
12	15
13	16
14	17
15	19
16	20
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	38
30	39
31	40
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	54
42	55
43	56
44	57
45	59
46	60
47	62
48	63
49	64
50	65
51	67
52	68
53	70
54	71
55	72
56	73
57	75
58	76
59	78
60	79
61	80
62	81
63	83
64	84
65	86
66	87
67	88
68	89

n	a(n)
1	0
2	1
3	3
4	4
5	6
6	7
7	8
8	9
9	11
10	12
11	14
12	15
13	16
14	17
15	19
16	20
17	22
18	23
19	24
20	25
21	27
22	28
23	30
24	31
25	32
26	33
27	35
28	36
29	38
30	39
31	40
32	41
33	43
34	44
35	46
36	47
37	48
38	49
39	51
40	52
41	54
42	55
43	56
44	57
45	59
46	60
47	62
48	63
49	64
50	65
51	67
52	68
53	70
54	71
55	72
56	73
57	75
58	76
59	78
60	79
61	80
62	81
63	83
64	84
65	86
66	87
67	88
68	89