A102684 - cp's OEIS frontend

A102684 Number of times the digit 9 appears in the decimal representations of all integers from 0 to n.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	2
21	2
22	2
23	2
24	2
25	2
26	2
27	2
28	2
29	3
30	3
31	3
32	3
33	3
34	3
35	3
36	3
37	3
38	3
39	4
40	4
41	4
42	4
43	4
44	4
45	4
46	4
47	4
48	4
49	5
50	5
51	5
52	5
53	5
54	5
55	5
56	5
57	5
58	5
59	6
60	6
61	6
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	7
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	8
88	8
89	9
90	10
91	11
92	12
93	13
94	14
95	15
96	16
97	17
98	18
99	20

[0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20]

cp's OEIS Frontend

A102684 Number of times the digit 9 appears in the decimal representations of all integers from 0 to n.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	2
21	2
22	2
23	2
24	2
25	2
26	2
27	2
28	2
29	3
30	3
31	3
32	3
33	3
34	3
35	3
36	3
37	3
38	3
39	4
40	4
41	4
42	4
43	4
44	4
45	4
46	4
47	4
48	4
49	5
50	5
51	5
52	5
53	5
54	5
55	5
56	5
57	5
58	5
59	6
60	6
61	6
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	7
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	8
88	8
89	9
90	10
91	11
92	12
93	13
94	14
95	15
96	16
97	17
98	18
99	20

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	2
21	2
22	2
23	2
24	2
25	2
26	2
27	2
28	2
29	3
30	3
31	3
32	3
33	3
34	3
35	3
36	3
37	3
38	3
39	4
40	4
41	4
42	4
43	4
44	4
45	4
46	4
47	4
48	4
49	5
50	5
51	5
52	5
53	5
54	5
55	5
56	5
57	5
58	5
59	6
60	6
61	6
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	7
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	8
88	8
89	9
90	10
91	11
92	12
93	13
94	14
95	15
96	16
97	17
98	18
99	20

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	1
10	1
11	1
12	1
13	1
14	1
15	1
16	1
17	1
18	1
19	2
20	2
21	2
22	2
23	2
24	2
25	2
26	2
27	2
28	2
29	3
30	3
31	3
32	3
33	3
34	3
35	3
36	3
37	3
38	3
39	4
40	4
41	4
42	4
43	4
44	4
45	4
46	4
47	4
48	4
49	5
50	5
51	5
52	5
53	5
54	5
55	5
56	5
57	5
58	5
59	6
60	6
61	6
62	6
63	6
64	6
65	6
66	6
67	6
68	6
69	7
70	7
71	7
72	7
73	7
74	7
75	7
76	7
77	7
78	7
79	8
80	8
81	8
82	8
83	8
84	8
85	8
86	8
87	8
88	8
89	9
90	10
91	11
92	12
93	13
94	14
95	15
96	16
97	17
98	18
99	20