A175945 - cp's OEIS frontend

A175945 Start with the binary expansion of n; list the lengths of the runs of ones and interpret this list as lengths of runs of alternating ones and zeros in binary.

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

[1, 1, 3, 1, 2, 3, 7, 1, 2, 2, 4, 3, 6, 7, 15, 1, 2, 2, 4, 2, 5, 4, 8, 3, 6, 6, 12, 7, 14, 15, 31, 1, 2, 2, 4, 2, 5, 4, 8, 2, 5, 5, 11, 4, 9, 8, 16, 3, 6, 6, 12, 6, 13, 12, 24, 7, 14, 14, 28, 15, 30, 31, 63, 1, 2, 2, 4, 2, 5, 4, 8, 2, 5, 5, 11, 4, 9, 8, 16, 2, 5, 5, 11, 5, 10, 11, 23, 4, 9, 9, 19, 8, 17]

cp's OEIS Frontend

A175945 Start with the binary expansion of n; list the lengths of the runs of ones and interpret this list as lengths of runs of alternating ones and zeros in binary.

Table of values

List of values

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

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

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