A047306 - OEIS

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A047306 as a simple table

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	21
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	35
32	37
33	38
34	39
35	40
36	41
37	42
38	44
39	45
40	46
41	47
42	48
43	49
44	51
45	52
46	53
47	54
48	55
49	56
50	58
51	59
52	60
53	61
54	62
55	63
56	65
57	66
58	67
59	68
60	69
61	70
62	72
63	73
64	74
65	75
66	76
67	77

[0,2,3,4,5,6,7,9,10,11,12,13,14,16,17,18,19,20,21, 23,24,25,26,27,28,30,31,32,33,34,35,37,38,39,40, 41,42,44,45,46,47,48,49,51,52,53,54,55,56,58,59, 60,61,62,63,65,66,67,68,69,70,72,73,74,75,76,77]

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	21
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	35
32	37
33	38
34	39
35	40
36	41
37	42
38	44
39	45
40	46
41	47
42	48
43	49
44	51
45	52
46	53
47	54
48	55
49	56
50	58
51	59
52	60
53	61
54	62
55	63
56	65
57	66
58	67
59	68
60	69
61	70
62	72
63	73
64	74
65	75
66	76
67	77

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	21
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	35
32	37
33	38
34	39
35	40
36	41
37	42
38	44
39	45
40	46
41	47
42	48
43	49
44	51
45	52
46	53
47	54
48	55
49	56
50	58
51	59
52	60
53	61
54	62
55	63
56	65
57	66
58	67
59	68
60	69
61	70
62	72
63	73
64	74
65	75
66	76
67	77

n	a(n)
1	0
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	16
15	17
16	18
17	19
18	20
19	21
20	23
21	24
22	25
23	26
24	27
25	28
26	30
27	31
28	32
29	33
30	34
31	35
32	37
33	38
34	39
35	40
36	41
37	42
38	44
39	45
40	46
41	47
42	48
43	49
44	51
45	52
46	53
47	54
48	55
49	56
50	58
51	59
52	60
53	61
54	62
55	63
56	65
57	66
58	67
59	68
60	69
61	70
62	72
63	73
64	74
65	75
66	76
67	77