A173023 - cp's OEIS frontend

A173023 Number of numbers <= n whose binary representation contains no isolated digits "11".

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

[1, 2, 3, 3, 4, 5, 5, 6, 7, 8, 9, 9, 9, 9, 10, 11, 12, 13, 14, 14, 15, 16, 16, 17, 17, 17, 17, 17, 18, 19, 20, 21, 22, 23, 24, 24, 25, 26, 26, 27, 28, 29, 30, 30, 30, 30, 31, 32, 32, 32, 32, 32, 32, 32, 32, 32, 33, 34, 35, 35, 36, 37, 38, 39, 40, 41, 42, 42, 43, 44, 44, 45, 46, 47]

cp's OEIS Frontend

A173023 Number of numbers <= n whose binary representation contains no isolated digits "11".

Table of values

List of values

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

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

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