A043689 - cp's OEIS frontend

A043689 a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 7 runs.

n	a(n)
1	42
2	74
3	82
4	84
5	85
6	86
7	90
8	106
9	138
10	146
11	148
12	149
13	150
14	154
15	162
16	164
17	165
18	166
19	168
20	169
21	171
22	172
23	173
24	174
25	178
26	180
27	181
28	182
29	186
30	202
31	210
32	212
33	213
34	214
35	218
36	234
37	266
38	274
39	276
40	277
41	278
42	282
43	290
44	292
45	293
46	294
47	296

[42, 74, 82, 84, 85, 86, 90, 106, 138, 146, 148, 149, 150, 154, 162, 164, 165, 166, 168, 169, 171, 172, 173, 174, 178, 180, 181, 182, 186, 202, 210, 212, 213, 214, 218, 234, 266, 274, 276, 277, 278, 282, 290, 292, 293, 294, 296]

cp's OEIS Frontend

A043689 a(n) = (s(n)-1)/2, where s(n) is the n-th number whose base-2 representation has exactly 7 runs.

Table of values

List of values

n	a(n)
1	42
2	74
3	82
4	84
5	85
6	86
7	90
8	106
9	138
10	146
11	148
12	149
13	150
14	154
15	162
16	164
17	165
18	166
19	168
20	169
21	171
22	172
23	173
24	174
25	178
26	180
27	181
28	182
29	186
30	202
31	210
32	212
33	213
34	214
35	218
36	234
37	266
38	274
39	276
40	277
41	278
42	282
43	290
44	292
45	293
46	294
47	296

n	a(n)
1	42
2	74
3	82
4	84
5	85
6	86
7	90
8	106
9	138
10	146
11	148
12	149
13	150
14	154
15	162
16	164
17	165
18	166
19	168
20	169
21	171
22	172
23	173
24	174
25	178
26	180
27	181
28	182
29	186
30	202
31	210
32	212
33	213
34	214
35	218
36	234
37	266
38	274
39	276
40	277
41	278
42	282
43	290
44	292
45	293
46	294
47	296

n	a(n)
1	42
2	74
3	82
4	84
5	85
6	86
7	90
8	106
9	138
10	146
11	148
12	149
13	150
14	154
15	162
16	164
17	165
18	166
19	168
20	169
21	171
22	172
23	173
24	174
25	178
26	180
27	181
28	182
29	186
30	202
31	210
32	212
33	213
34	214
35	218
36	234
37	266
38	274
39	276
40	277
41	278
42	282
43	290
44	292
45	293
46	294
47	296