A165317 - cp's OEIS frontend

A165317 a(n) = the number of digits in the binary representation of n that each do not precede or follow a similarly valued digit.

n	a(n)
1	1
2	2
3	0
4	1
5	3
6	1
7	0
8	1
9	2
10	4
11	2
12	0
13	2
14	1
15	0
16	1
17	2
18	3
19	1
20	3
21	5
22	3
23	2
24	0
25	1
26	3
27	1
28	0
29	2
30	1
31	0
32	1
33	2
34	3
35	1
36	2
37	4
38	2
39	1
40	3
41	4
42	6
43	4
44	2
45	4
46	3
47	2
48	0
49	1
50	2
51	0
52	2
53	4
54	2
55	1
56	0
57	1
58	3
59	1
60	0
61	2
62	1
63	0
64	1
65	2
66	3
67	1
68	2
69	4
70	2
71	1
72	2
73	3
74	5
75	3
76	1
77	3
78	2
79	1
80	3
81	4
82	5
83	3
84	5
85	7
86	5
87	4
88	2
89	3
90	5
91	3
92	2
93	4
94	3
95	2
96	0
97	1
98	2
99	0
100	1
101	3
102	1
103	0
104	2
105	3

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

cp's OEIS Frontend

A165317 a(n) = the number of digits in the binary representation of n that each do not precede or follow a similarly valued digit.

Table of values

List of values

n	a(n)
1	1
2	2
3	0
4	1
5	3
6	1
7	0
8	1
9	2
10	4
11	2
12	0
13	2
14	1
15	0
16	1
17	2
18	3
19	1
20	3
21	5
22	3
23	2
24	0
25	1
26	3
27	1
28	0
29	2
30	1
31	0
32	1
33	2
34	3
35	1
36	2
37	4
38	2
39	1
40	3
41	4
42	6
43	4
44	2
45	4
46	3
47	2
48	0
49	1
50	2
51	0
52	2
53	4
54	2
55	1
56	0
57	1
58	3
59	1
60	0
61	2
62	1
63	0
64	1
65	2
66	3
67	1
68	2
69	4
70	2
71	1
72	2
73	3
74	5
75	3
76	1
77	3
78	2
79	1
80	3
81	4
82	5
83	3
84	5
85	7
86	5
87	4
88	2
89	3
90	5
91	3
92	2
93	4
94	3
95	2
96	0
97	1
98	2
99	0
100	1
101	3
102	1
103	0
104	2
105	3

n	a(n)
1	1
2	2
3	0
4	1
5	3
6	1
7	0
8	1
9	2
10	4
11	2
12	0
13	2
14	1
15	0
16	1
17	2
18	3
19	1
20	3
21	5
22	3
23	2
24	0
25	1
26	3
27	1
28	0
29	2
30	1
31	0
32	1
33	2
34	3
35	1
36	2
37	4
38	2
39	1
40	3
41	4
42	6
43	4
44	2
45	4
46	3
47	2
48	0
49	1
50	2
51	0
52	2
53	4
54	2
55	1
56	0
57	1
58	3
59	1
60	0
61	2
62	1
63	0
64	1
65	2
66	3
67	1
68	2
69	4
70	2
71	1
72	2
73	3
74	5
75	3
76	1
77	3
78	2
79	1
80	3
81	4
82	5
83	3
84	5
85	7
86	5
87	4
88	2
89	3
90	5
91	3
92	2
93	4
94	3
95	2
96	0
97	1
98	2
99	0
100	1
101	3
102	1
103	0
104	2
105	3

n	a(n)
1	1
2	2
3	0
4	1
5	3
6	1
7	0
8	1
9	2
10	4
11	2
12	0
13	2
14	1
15	0
16	1
17	2
18	3
19	1
20	3
21	5
22	3
23	2
24	0
25	1
26	3
27	1
28	0
29	2
30	1
31	0
32	1
33	2
34	3
35	1
36	2
37	4
38	2
39	1
40	3
41	4
42	6
43	4
44	2
45	4
46	3
47	2
48	0
49	1
50	2
51	0
52	2
53	4
54	2
55	1
56	0
57	1
58	3
59	1
60	0
61	2
62	1
63	0
64	1
65	2
66	3
67	1
68	2
69	4
70	2
71	1
72	2
73	3
74	5
75	3
76	1
77	3
78	2
79	1
80	3
81	4
82	5
83	3
84	5
85	7
86	5
87	4
88	2
89	3
90	5
91	3
92	2
93	4
94	3
95	2
96	0
97	1
98	2
99	0
100	1
101	3
102	1
103	0
104	2
105	3