A135319 - cp's OEIS frontend

A135319 a(n) is the first digit after the decimal point in the decimal expansion of log_10(n), i.e., of the Briggsian logarithm of n.

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

[0, 3, 4, 6, 6, 7, 8, 9, 9, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9]

cp's OEIS Frontend

A135319 a(n) is the first digit after the decimal point in the decimal expansion of log_10(n), i.e., of the Briggsian logarithm of n.

Table of values

List of values

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

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

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