A003247 - OEIS

A003247 as a simple table

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	36
32	37
33	38
34	40
35	41
36	42
37	43
38	44
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	56
49	57
50	58
51	59
52	61
53	62
54	63
55	64
56	65
57	66
58	67
59	68
60	70
61	71
62	72
63	73
64	74
65	75
66	76
67	77

[1,2,3,4,6,7,8,9,10,11,12,13,15,16,17,18,19,21,22, 23,24,25,26,27,28,30,31,32,33,34,36,37,38,40,41, 42,43,44,46,47,48,49,50,51,52,53,55,56,57,58,59, 61,62,63,64,65,66,67,68,70,71,72,73,74,75,76,77]

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	36
32	37
33	38
34	40
35	41
36	42
37	43
38	44
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	56
49	57
50	58
51	59
52	61
53	62
54	63
55	64
56	65
57	66
58	67
59	68
60	70
61	71
62	72
63	73
64	74
65	75
66	76
67	77

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	36
32	37
33	38
34	40
35	41
36	42
37	43
38	44
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	56
49	57
50	58
51	59
52	61
53	62
54	63
55	64
56	65
57	66
58	67
59	68
60	70
61	71
62	72
63	73
64	74
65	75
66	76
67	77

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	8
8	9
9	10
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	22
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	36
32	37
33	38
34	40
35	41
36	42
37	43
38	44
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	56
49	57
50	58
51	59
52	61
53	62
54	63
55	64
56	65
57	66
58	67
59	68
60	70
61	71
62	72
63	73
64	74
65	75
66	76
67	77