A336514 - cp's OEIS frontend

A336514 a(1) = 1, and for any n > 0, a(n+1) is the number of k in the range 1..n such that the decimal representation of a(k) appears as a substring in the decimal representation of a(n).

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	5
10	1
11	6
12	1
13	7
14	1
15	8
16	1
17	9
18	1
19	10
20	11
21	11
22	12
23	12
24	13
25	12
26	14
27	12
28	15
29	12
30	16
31	12
32	17
33	12
34	18
35	12
36	19
37	12
38	20
39	2
40	2
41	3
42	2
43	4
44	2
45	5
46	2
47	6
48	2
49	7
50	2
51	8
52	2
53	9
54	2
55	10
56	12
57	30
58	3
59	3
60	4
61	3
62	5
63	3
64	6
65	3
66	7
67	3
68	8
69	3
70	9
71	3
72	10
73	13
74	22
75	11
76	13
77	23

[1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 11, 11, 12, 12, 13, 12, 14, 12, 15, 12, 16, 12, 17, 12, 18, 12, 19, 12, 20, 2, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 2, 9, 2, 10, 12, 30, 3, 3, 4, 3, 5, 3, 6, 3, 7, 3, 8, 3, 9, 3, 10, 13, 22, 11, 13, 23]

cp's OEIS Frontend

A336514 a(1) = 1, and for any n > 0, a(n+1) is the number of k in the range 1..n such that the decimal representation of a(k) appears as a substring in the decimal representation of a(n).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	5
10	1
11	6
12	1
13	7
14	1
15	8
16	1
17	9
18	1
19	10
20	11
21	11
22	12
23	12
24	13
25	12
26	14
27	12
28	15
29	12
30	16
31	12
32	17
33	12
34	18
35	12
36	19
37	12
38	20
39	2
40	2
41	3
42	2
43	4
44	2
45	5
46	2
47	6
48	2
49	7
50	2
51	8
52	2
53	9
54	2
55	10
56	12
57	30
58	3
59	3
60	4
61	3
62	5
63	3
64	6
65	3
66	7
67	3
68	8
69	3
70	9
71	3
72	10
73	13
74	22
75	11
76	13
77	23

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	5
10	1
11	6
12	1
13	7
14	1
15	8
16	1
17	9
18	1
19	10
20	11
21	11
22	12
23	12
24	13
25	12
26	14
27	12
28	15
29	12
30	16
31	12
32	17
33	12
34	18
35	12
36	19
37	12
38	20
39	2
40	2
41	3
42	2
43	4
44	2
45	5
46	2
47	6
48	2
49	7
50	2
51	8
52	2
53	9
54	2
55	10
56	12
57	30
58	3
59	3
60	4
61	3
62	5
63	3
64	6
65	3
66	7
67	3
68	8
69	3
70	9
71	3
72	10
73	13
74	22
75	11
76	13
77	23

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	1
7	4
8	1
9	5
10	1
11	6
12	1
13	7
14	1
15	8
16	1
17	9
18	1
19	10
20	11
21	11
22	12
23	12
24	13
25	12
26	14
27	12
28	15
29	12
30	16
31	12
32	17
33	12
34	18
35	12
36	19
37	12
38	20
39	2
40	2
41	3
42	2
43	4
44	2
45	5
46	2
47	6
48	2
49	7
50	2
51	8
52	2
53	9
54	2
55	10
56	12
57	30
58	3
59	3
60	4
61	3
62	5
63	3
64	6
65	3
66	7
67	3
68	8
69	3
70	9
71	3
72	10
73	13
74	22
75	11
76	13
77	23