A381754 - cp's OEIS frontend

A381754 Numbers k such that k and 3*k have the same number of zeros in their binary expansions.

n	a(n)
1	0
2	1
3	2
4	4
5	8
6	16
7	19
8	32
9	35
10	38
11	39
12	53
13	64
14	67
15	70
16	71
17	76
18	78
19	79
20	101
21	105
22	106
23	117
24	128
25	131
26	134
27	135
28	140
29	142
30	143
31	152
32	156
33	158
34	159
35	197
36	201
37	202
38	209
39	210
40	212
41	229
42	233
43	234
44	245
45	256
46	259
47	262
48	263
49	268
50	270
51	271
52	280
53	284
54	286
55	287
56	301
57	304

[0, 1, 2, 4, 8, 16, 19, 32, 35, 38, 39, 53, 64, 67, 70, 71, 76, 78, 79, 101, 105, 106, 117, 128, 131, 134, 135, 140, 142, 143, 152, 156, 158, 159, 197, 201, 202, 209, 210, 212, 229, 233, 234, 245, 256, 259, 262, 263, 268, 270, 271, 280, 284, 286, 287, 301, 304]

cp's OEIS Frontend

A381754 Numbers k such that k and 3*k have the same number of zeros in their binary expansions.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	4
5	8
6	16
7	19
8	32
9	35
10	38
11	39
12	53
13	64
14	67
15	70
16	71
17	76
18	78
19	79
20	101
21	105
22	106
23	117
24	128
25	131
26	134
27	135
28	140
29	142
30	143
31	152
32	156
33	158
34	159
35	197
36	201
37	202
38	209
39	210
40	212
41	229
42	233
43	234
44	245
45	256
46	259
47	262
48	263
49	268
50	270
51	271
52	280
53	284
54	286
55	287
56	301
57	304

n	a(n)
1	0
2	1
3	2
4	4
5	8
6	16
7	19
8	32
9	35
10	38
11	39
12	53
13	64
14	67
15	70
16	71
17	76
18	78
19	79
20	101
21	105
22	106
23	117
24	128
25	131
26	134
27	135
28	140
29	142
30	143
31	152
32	156
33	158
34	159
35	197
36	201
37	202
38	209
39	210
40	212
41	229
42	233
43	234
44	245
45	256
46	259
47	262
48	263
49	268
50	270
51	271
52	280
53	284
54	286
55	287
56	301
57	304

n	a(n)
1	0
2	1
3	2
4	4
5	8
6	16
7	19
8	32
9	35
10	38
11	39
12	53
13	64
14	67
15	70
16	71
17	76
18	78
19	79
20	101
21	105
22	106
23	117
24	128
25	131
26	134
27	135
28	140
29	142
30	143
31	152
32	156
33	158
34	159
35	197
36	201
37	202
38	209
39	210
40	212
41	229
42	233
43	234
44	245
45	256
46	259
47	262
48	263
49	268
50	270
51	271
52	280
53	284
54	286
55	287
56	301
57	304