A384309 - cp's OEIS frontend

A384309 a(1) = 1. Thereafter a(n) is the cardinality of the set of terms whose leading decimal digit is the same as that of a(n-1).

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	12
22	13
23	14
24	15
25	16
26	17
27	18
28	19
29	20
30	2
31	3
32	2
33	4
34	2
35	5
36	2
37	6
38	2
39	7
40	2
41	8
42	2
43	9
44	2
45	10
46	21
47	11
48	22
49	12
50	23
51	13
52	24
53	14
54	25
55	15
56	26
57	16
58	27
59	17
60	28
61	18
62	29
63	19
64	30
65	3
66	4
67	3
68	5
69	3
70	6
71	3
72	7
73	3
74	8
75	3
76	9
77	3
78	10
79	31
80	11

[1, 1, 2, 1, 3, 1, 4, 1, 5, 1, 6, 1, 7, 1, 8, 1, 9, 1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 2, 3, 2, 4, 2, 5, 2, 6, 2, 7, 2, 8, 2, 9, 2, 10, 21, 11, 22, 12, 23, 13, 24, 14, 25, 15, 26, 16, 27, 17, 28, 18, 29, 19, 30, 3, 4, 3, 5, 3, 6, 3, 7, 3, 8, 3, 9, 3, 10, 31, 11]

cp's OEIS Frontend

A384309 a(1) = 1. Thereafter a(n) is the cardinality of the set of terms whose leading decimal digit is the same as that of a(n-1).

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	12
22	13
23	14
24	15
25	16
26	17
27	18
28	19
29	20
30	2
31	3
32	2
33	4
34	2
35	5
36	2
37	6
38	2
39	7
40	2
41	8
42	2
43	9
44	2
45	10
46	21
47	11
48	22
49	12
50	23
51	13
52	24
53	14
54	25
55	15
56	26
57	16
58	27
59	17
60	28
61	18
62	29
63	19
64	30
65	3
66	4
67	3
68	5
69	3
70	6
71	3
72	7
73	3
74	8
75	3
76	9
77	3
78	10
79	31
80	11

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	12
22	13
23	14
24	15
25	16
26	17
27	18
28	19
29	20
30	2
31	3
32	2
33	4
34	2
35	5
36	2
37	6
38	2
39	7
40	2
41	8
42	2
43	9
44	2
45	10
46	21
47	11
48	22
49	12
50	23
51	13
52	24
53	14
54	25
55	15
56	26
57	16
58	27
59	17
60	28
61	18
62	29
63	19
64	30
65	3
66	4
67	3
68	5
69	3
70	6
71	3
72	7
73	3
74	8
75	3
76	9
77	3
78	10
79	31
80	11

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	12
22	13
23	14
24	15
25	16
26	17
27	18
28	19
29	20
30	2
31	3
32	2
33	4
34	2
35	5
36	2
37	6
38	2
39	7
40	2
41	8
42	2
43	9
44	2
45	10
46	21
47	11
48	22
49	12
50	23
51	13
52	24
53	14
54	25
55	15
56	26
57	16
58	27
59	17
60	28
61	18
62	29
63	19
64	30
65	3
66	4
67	3
68	5
69	3
70	6
71	3
72	7
73	3
74	8
75	3
76	9
77	3
78	10
79	31
80	11