A161511 - cp's OEIS frontend

A161511 Number of 1...0 pairs in the binary representation of 2n.

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

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

cp's OEIS Frontend

A161511 Number of 1...0 pairs in the binary representation of 2n.

Table of values

List of values

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

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

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