A308387 - cp's OEIS frontend

A308387 Lexicographically earliest self-describing sequence of distinct terms such that, when we read digit after digit from the left to the right, the n-th digit of the sequence is duplicated at the digit-position a(n). After all duplications are done, the resulting sequence is itself.

n	a(n)
1	2
2	20
3	6
4	10
5	8
6	11
7	60
8	5
9	13
10	4
11	3
12	19
13	52
14	16
15	24
16	14
17	9
18	27
19	12
20	1
21	17
22	36
23	28
24	15
25	21
26	43
27	18
28	23
29	34
30	61
31	37
32	25
33	30
34	68
35	100
36	22
37	31
38	7
39	32
40	56
41	47
42	33
43	26
44	35
45	39
46	38
47	41
48	44
49	48
50	73
51	59
52	42
53	49
54	130
55	64
56	40
57	53
58	62
59	51
60	46
61	45
62	58
63	101
64	55
65	70
66	57
67	86

[2, 20, 6, 10, 8, 11, 60, 5, 13, 4, 3, 19, 52, 16, 24, 14, 9, 27, 12, 1, 17, 36, 28, 15, 21, 43, 18, 23, 34, 61, 37, 25, 30, 68, 100, 22, 31, 7, 32, 56, 47, 33, 26, 35, 39, 38, 41, 44, 48, 73, 59, 42, 49, 130, 64, 40, 53, 62, 51, 46, 45, 58, 101, 55, 70, 57, 86]

cp's OEIS Frontend

A308387 Lexicographically earliest self-describing sequence of distinct terms such that, when we read digit after digit from the left to the right, the n-th digit of the sequence is duplicated at the digit-position a(n). After all duplications are done, the resulting sequence is itself.

Table of values

List of values

n	a(n)
1	2
2	20
3	6
4	10
5	8
6	11
7	60
8	5
9	13
10	4
11	3
12	19
13	52
14	16
15	24
16	14
17	9
18	27
19	12
20	1
21	17
22	36
23	28
24	15
25	21
26	43
27	18
28	23
29	34
30	61
31	37
32	25
33	30
34	68
35	100
36	22
37	31
38	7
39	32
40	56
41	47
42	33
43	26
44	35
45	39
46	38
47	41
48	44
49	48
50	73
51	59
52	42
53	49
54	130
55	64
56	40
57	53
58	62
59	51
60	46
61	45
62	58
63	101
64	55
65	70
66	57
67	86

n	a(n)
1	2
2	20
3	6
4	10
5	8
6	11
7	60
8	5
9	13
10	4
11	3
12	19
13	52
14	16
15	24
16	14
17	9
18	27
19	12
20	1
21	17
22	36
23	28
24	15
25	21
26	43
27	18
28	23
29	34
30	61
31	37
32	25
33	30
34	68
35	100
36	22
37	31
38	7
39	32
40	56
41	47
42	33
43	26
44	35
45	39
46	38
47	41
48	44
49	48
50	73
51	59
52	42
53	49
54	130
55	64
56	40
57	53
58	62
59	51
60	46
61	45
62	58
63	101
64	55
65	70
66	57
67	86

n	a(n)
1	2
2	20
3	6
4	10
5	8
6	11
7	60
8	5
9	13
10	4
11	3
12	19
13	52
14	16
15	24
16	14
17	9
18	27
19	12
20	1
21	17
22	36
23	28
24	15
25	21
26	43
27	18
28	23
29	34
30	61
31	37
32	25
33	30
34	68
35	100
36	22
37	31
38	7
39	32
40	56
41	47
42	33
43	26
44	35
45	39
46	38
47	41
48	44
49	48
50	73
51	59
52	42
53	49
54	130
55	64
56	40
57	53
58	62
59	51
60	46
61	45
62	58
63	101
64	55
65	70
66	57
67	86