A065710 - cp's OEIS frontend

A065710 Number of 2's in the decimal expansion of 2^n.

n	a(n)
0	0
1	1
2	0
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	1
11	1
12	0
13	1
14	0
15	1
16	0
17	1
18	2
19	2
20	0
21	2
22	0
23	0
24	1
25	1
26	0
27	2
28	1
29	1
30	1
31	1
32	2
33	1
34	0
35	0
36	0
37	1
38	1
39	0
40	1
41	4
42	0
43	3
44	1
45	2
46	0
47	1
48	1
49	3
50	3
51	3
52	1
53	2
54	0
55	1
56	2
57	1
58	2
59	2
60	2
61	3
62	1
63	3
64	0
65	2
66	2
67	3
68	3
69	2
70	2
71	4
72	4
73	4
74	0
75	1
76	2
77	4
78	3
79	1
80	3
81	6
82	2
83	0
84	2
85	4
86	4
87	4
88	2
89	3
90	6
91	2
92	1
93	5
94	1
95	2
96	4
97	4
98	1
99	2
100	6

[0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 2, 2, 0, 2, 0, 0, 1, 1, 0, 2, 1, 1, 1, 1, 2, 1, 0, 0, 0, 1, 1, 0, 1, 4, 0, 3, 1, 2, 0, 1, 1, 3, 3, 3, 1, 2, 0, 1, 2, 1, 2, 2, 2, 3, 1, 3, 0, 2, 2, 3, 3, 2, 2, 4, 4, 4, 0, 1, 2, 4, 3, 1, 3, 6, 2, 0, 2, 4, 4, 4, 2, 3, 6, 2, 1, 5, 1, 2, 4, 4, 1, 2, 6]

cp's OEIS Frontend

A065710 Number of 2's in the decimal expansion of 2^n.

Table of values

List of values

n	a(n)
0	0
1	1
2	0
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	1
11	1
12	0
13	1
14	0
15	1
16	0
17	1
18	2
19	2
20	0
21	2
22	0
23	0
24	1
25	1
26	0
27	2
28	1
29	1
30	1
31	1
32	2
33	1
34	0
35	0
36	0
37	1
38	1
39	0
40	1
41	4
42	0
43	3
44	1
45	2
46	0
47	1
48	1
49	3
50	3
51	3
52	1
53	2
54	0
55	1
56	2
57	1
58	2
59	2
60	2
61	3
62	1
63	3
64	0
65	2
66	2
67	3
68	3
69	2
70	2
71	4
72	4
73	4
74	0
75	1
76	2
77	4
78	3
79	1
80	3
81	6
82	2
83	0
84	2
85	4
86	4
87	4
88	2
89	3
90	6
91	2
92	1
93	5
94	1
95	2
96	4
97	4
98	1
99	2
100	6

n	a(n)
0	0
1	1
2	0
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	1
11	1
12	0
13	1
14	0
15	1
16	0
17	1
18	2
19	2
20	0
21	2
22	0
23	0
24	1
25	1
26	0
27	2
28	1
29	1
30	1
31	1
32	2
33	1
34	0
35	0
36	0
37	1
38	1
39	0
40	1
41	4
42	0
43	3
44	1
45	2
46	0
47	1
48	1
49	3
50	3
51	3
52	1
53	2
54	0
55	1
56	2
57	1
58	2
59	2
60	2
61	3
62	1
63	3
64	0
65	2
66	2
67	3
68	3
69	2
70	2
71	4
72	4
73	4
74	0
75	1
76	2
77	4
78	3
79	1
80	3
81	6
82	2
83	0
84	2
85	4
86	4
87	4
88	2
89	3
90	6
91	2
92	1
93	5
94	1
95	2
96	4
97	4
98	1
99	2
100	6

n	a(n)
0	0
1	1
2	0
3	0
4	0
5	1
6	0
7	1
8	1
9	1
10	1
11	1
12	0
13	1
14	0
15	1
16	0
17	1
18	2
19	2
20	0
21	2
22	0
23	0
24	1
25	1
26	0
27	2
28	1
29	1
30	1
31	1
32	2
33	1
34	0
35	0
36	0
37	1
38	1
39	0
40	1
41	4
42	0
43	3
44	1
45	2
46	0
47	1
48	1
49	3
50	3
51	3
52	1
53	2
54	0
55	1
56	2
57	1
58	2
59	2
60	2
61	3
62	1
63	3
64	0
65	2
66	2
67	3
68	3
69	2
70	2
71	4
72	4
73	4
74	0
75	1
76	2
77	4
78	3
79	1
80	3
81	6
82	2
83	0
84	2
85	4
86	4
87	4
88	2
89	3
90	6
91	2
92	1
93	5
94	1
95	2
96	4
97	4
98	1
99	2
100	6