A055253 - cp's OEIS frontend

A055253 Number of even digits in 2^n.

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

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

cp's OEIS Frontend

A055253 Number of even digits in 2^n.

Table of values

List of values

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

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

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