A036994 - cp's OEIS frontend

A036994 Numbers k with the property that reading from right to left in the binary expansion of k, the number of 1's always stays ahead of the number of 0's.

n	a(n)
1	1
2	3
3	7
4	11
5	15
6	23
7	27
8	31
9	39
10	43
11	47
12	55
13	59
14	63
15	79
16	87
17	91
18	95
19	103
20	107
21	111
22	119
23	123
24	127
25	143
26	151
27	155
28	159
29	167
30	171
31	175
32	183
33	187
34	191
35	207
36	215
37	219
38	223
39	231
40	235
41	239
42	247
43	251
44	255
45	287
46	303
47	311
48	315
49	319
50	335
51	343
52	347
53	351
54	359
55	363
56	367

[1, 3, 7, 11, 15, 23, 27, 31, 39, 43, 47, 55, 59, 63, 79, 87, 91, 95, 103, 107, 111, 119, 123, 127, 143, 151, 155, 159, 167, 171, 175, 183, 187, 191, 207, 215, 219, 223, 231, 235, 239, 247, 251, 255, 287, 303, 311, 315, 319, 335, 343, 347, 351, 359, 363, 367]

cp's OEIS Frontend

A036994 Numbers k with the property that reading from right to left in the binary expansion of k, the number of 1's always stays ahead of the number of 0's.

Table of values

List of values

n	a(n)
1	1
2	3
3	7
4	11
5	15
6	23
7	27
8	31
9	39
10	43
11	47
12	55
13	59
14	63
15	79
16	87
17	91
18	95
19	103
20	107
21	111
22	119
23	123
24	127
25	143
26	151
27	155
28	159
29	167
30	171
31	175
32	183
33	187
34	191
35	207
36	215
37	219
38	223
39	231
40	235
41	239
42	247
43	251
44	255
45	287
46	303
47	311
48	315
49	319
50	335
51	343
52	347
53	351
54	359
55	363
56	367

n	a(n)
1	1
2	3
3	7
4	11
5	15
6	23
7	27
8	31
9	39
10	43
11	47
12	55
13	59
14	63
15	79
16	87
17	91
18	95
19	103
20	107
21	111
22	119
23	123
24	127
25	143
26	151
27	155
28	159
29	167
30	171
31	175
32	183
33	187
34	191
35	207
36	215
37	219
38	223
39	231
40	235
41	239
42	247
43	251
44	255
45	287
46	303
47	311
48	315
49	319
50	335
51	343
52	347
53	351
54	359
55	363
56	367

n	a(n)
1	1
2	3
3	7
4	11
5	15
6	23
7	27
8	31
9	39
10	43
11	47
12	55
13	59
14	63
15	79
16	87
17	91
18	95
19	103
20	107
21	111
22	119
23	123
24	127
25	143
26	151
27	155
28	159
29	167
30	171
31	175
32	183
33	187
34	191
35	207
36	215
37	219
38	223
39	231
40	235
41	239
42	247
43	251
44	255
45	287
46	303
47	311
48	315
49	319
50	335
51	343
52	347
53	351
54	359
55	363
56	367