A043682 - cp's OEIS frontend

A043682 a(n) = (1/2)*(n-th number whose base-2 representation has exactly 4 runs).

n	a(n)
1	5
2	9
3	10
4	11
5	13
6	17
7	18
8	19
9	20
10	22
11	23
12	25
13	26
14	27
15	29
16	33
17	34
18	35
19	36
20	38
21	39
22	40
23	44
24	46
25	47
26	49
27	50
28	51
29	52
30	54
31	55
32	57
33	58
34	59
35	61
36	65
37	66
38	67
39	68
40	70
41	71
42	72
43	76
44	78
45	79
46	80
47	88
48	92
49	94
50	95
51	97
52	98
53	99
54	100
55	102
56	103
57	104
58	108
59	110

[5, 9, 10, 11, 13, 17, 18, 19, 20, 22, 23, 25, 26, 27, 29, 33, 34, 35, 36, 38, 39, 40, 44, 46, 47, 49, 50, 51, 52, 54, 55, 57, 58, 59, 61, 65, 66, 67, 68, 70, 71, 72, 76, 78, 79, 80, 88, 92, 94, 95, 97, 98, 99, 100, 102, 103, 104, 108, 110]

cp's OEIS Frontend

A043682 a(n) = (1/2)*(n-th number whose base-2 representation has exactly 4 runs).

Table of values

List of values

n	a(n)
1	5
2	9
3	10
4	11
5	13
6	17
7	18
8	19
9	20
10	22
11	23
12	25
13	26
14	27
15	29
16	33
17	34
18	35
19	36
20	38
21	39
22	40
23	44
24	46
25	47
26	49
27	50
28	51
29	52
30	54
31	55
32	57
33	58
34	59
35	61
36	65
37	66
38	67
39	68
40	70
41	71
42	72
43	76
44	78
45	79
46	80
47	88
48	92
49	94
50	95
51	97
52	98
53	99
54	100
55	102
56	103
57	104
58	108
59	110

n	a(n)
1	5
2	9
3	10
4	11
5	13
6	17
7	18
8	19
9	20
10	22
11	23
12	25
13	26
14	27
15	29
16	33
17	34
18	35
19	36
20	38
21	39
22	40
23	44
24	46
25	47
26	49
27	50
28	51
29	52
30	54
31	55
32	57
33	58
34	59
35	61
36	65
37	66
38	67
39	68
40	70
41	71
42	72
43	76
44	78
45	79
46	80
47	88
48	92
49	94
50	95
51	97
52	98
53	99
54	100
55	102
56	103
57	104
58	108
59	110

n	a(n)
1	5
2	9
3	10
4	11
5	13
6	17
7	18
8	19
9	20
10	22
11	23
12	25
13	26
14	27
15	29
16	33
17	34
18	35
19	36
20	38
21	39
22	40
23	44
24	46
25	47
26	49
27	50
28	51
29	52
30	54
31	55
32	57
33	58
34	59
35	61
36	65
37	66
38	67
39	68
40	70
41	71
42	72
43	76
44	78
45	79
46	80
47	88
48	92
49	94
50	95
51	97
52	98
53	99
54	100
55	102
56	103
57	104
58	108
59	110