A125132 - cp's OEIS frontend

A125132 Self-describing sequence: sequence starts with a(1) = 1 and a(n) is chosen to be the smallest positive number not already in the sequence such that the assertion "sequence gives the positions of the odd digits when the sequence is read as a string of digits" is true.

n	a(n)
1	1
2	3
3	5
4	2
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	37
22	39
23	41
24	43
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	59
33	61
34	63
35	65
36	67
37	69
38	71
39	73
40	75
41	77
42	79
43	81
44	83
45	85
46	87
47	89
48	91
49	93
50	95
51	97
52	99
53	110
54	10
55	12
56	14
57	16
58	111
59	28
60	30
61	32
62	34
63	36
64	48
65	50
66	52

[1, 3, 5, 2, 7, 8, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 110, 10, 12, 14, 16, 111, 28, 30, 32, 34, 36, 48, 50, 52]

cp's OEIS Frontend

A125132 Self-describing sequence: sequence starts with a(1) = 1 and a(n) is chosen to be the smallest positive number not already in the sequence such that the assertion "sequence gives the positions of the odd digits when the sequence is read as a string of digits" is true.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	2
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	37
22	39
23	41
24	43
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	59
33	61
34	63
35	65
36	67
37	69
38	71
39	73
40	75
41	77
42	79
43	81
44	83
45	85
46	87
47	89
48	91
49	93
50	95
51	97
52	99
53	110
54	10
55	12
56	14
57	16
58	111
59	28
60	30
61	32
62	34
63	36
64	48
65	50
66	52

n	a(n)
1	1
2	3
3	5
4	2
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	37
22	39
23	41
24	43
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	59
33	61
34	63
35	65
36	67
37	69
38	71
39	73
40	75
41	77
42	79
43	81
44	83
45	85
46	87
47	89
48	91
49	93
50	95
51	97
52	99
53	110
54	10
55	12
56	14
57	16
58	111
59	28
60	30
61	32
62	34
63	36
64	48
65	50
66	52

n	a(n)
1	1
2	3
3	5
4	2
5	7
6	8
7	9
8	11
9	13
10	15
11	17
12	19
13	21
14	23
15	25
16	27
17	29
18	31
19	33
20	35
21	37
22	39
23	41
24	43
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	59
33	61
34	63
35	65
36	67
37	69
38	71
39	73
40	75
41	77
42	79
43	81
44	83
45	85
46	87
47	89
48	91
49	93
50	95
51	97
52	99
53	110
54	10
55	12
56	14
57	16
58	111
59	28
60	30
61	32
62	34
63	36
64	48
65	50
66	52