A210434 - cp's OEIS frontend

A210434 Number of digits in 4^n.

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	6
10	7
11	7
12	8
13	8
14	9
15	10
16	10
17	11
18	11
19	12
20	13
21	13
22	14
23	14
24	15
25	16
26	16
27	17
28	17
29	18
30	19
31	19
32	20
33	20
34	21
35	22
36	22
37	23
38	23
39	24
40	25
41	25
42	26
43	26
44	27
45	28
46	28
47	29
48	29
49	30
50	31
51	31
52	32
53	32
54	33
55	34
56	34
57	35
58	35
59	36
60	37
61	37
62	38
63	38
64	39
65	40
66	40
67	41
68	41

[1, 1, 2, 2, 3, 4, 4, 5, 5, 6, 7, 7, 8, 8, 9, 10, 10, 11, 11, 12, 13, 13, 14, 14, 15, 16, 16, 17, 17, 18, 19, 19, 20, 20, 21, 22, 22, 23, 23, 24, 25, 25, 26, 26, 27, 28, 28, 29, 29, 30, 31, 31, 32, 32, 33, 34, 34, 35, 35, 36, 37, 37, 38, 38, 39, 40, 40, 41, 41]

cp's OEIS Frontend

A210434 Number of digits in 4^n.

Table of values

List of values

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	6
10	7
11	7
12	8
13	8
14	9
15	10
16	10
17	11
18	11
19	12
20	13
21	13
22	14
23	14
24	15
25	16
26	16
27	17
28	17
29	18
30	19
31	19
32	20
33	20
34	21
35	22
36	22
37	23
38	23
39	24
40	25
41	25
42	26
43	26
44	27
45	28
46	28
47	29
48	29
49	30
50	31
51	31
52	32
53	32
54	33
55	34
56	34
57	35
58	35
59	36
60	37
61	37
62	38
63	38
64	39
65	40
66	40
67	41
68	41

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	6
10	7
11	7
12	8
13	8
14	9
15	10
16	10
17	11
18	11
19	12
20	13
21	13
22	14
23	14
24	15
25	16
26	16
27	17
28	17
29	18
30	19
31	19
32	20
33	20
34	21
35	22
36	22
37	23
38	23
39	24
40	25
41	25
42	26
43	26
44	27
45	28
46	28
47	29
48	29
49	30
50	31
51	31
52	32
53	32
54	33
55	34
56	34
57	35
58	35
59	36
60	37
61	37
62	38
63	38
64	39
65	40
66	40
67	41
68	41

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	4
6	4
7	5
8	5
9	6
10	7
11	7
12	8
13	8
14	9
15	10
16	10
17	11
18	11
19	12
20	13
21	13
22	14
23	14
24	15
25	16
26	16
27	17
28	17
29	18
30	19
31	19
32	20
33	20
34	21
35	22
36	22
37	23
38	23
39	24
40	25
41	25
42	26
43	26
44	27
45	28
46	28
47	29
48	29
49	30
50	31
51	31
52	32
53	32
54	33
55	34
56	34
57	35
58	35
59	36
60	37
61	37
62	38
63	38
64	39
65	40
66	40
67	41
68	41