A386971 - cp's OEIS frontend

A386971 Numbers k >= 1 such that w(k-r) + ... + w(k-1) = w(k+1) + ... + w(k+r) for some r >= 1 where w(i) is the binary weight of i (A000120).

n	a(n)
1	3
2	4
3	7
4	8
5	11
6	12
7	14
8	15
9	16
10	17
11	19
12	20
13	23
14	24
15	27
16	28
17	29
18	31
19	32
20	34
21	35
22	36
23	39
24	40
25	43
26	44
27	46
28	47
29	48
30	49
31	51
32	52
33	55
34	56
35	58
36	59
37	60
38	63
39	64
40	67
41	68
42	69
43	71
44	72
45	75
46	76
47	78
48	79
49	80
50	81
51	83
52	84
53	87
54	88
55	91
56	92
57	93
58	95
59	96
60	98
61	99
62	100
63	103
64	104
65	107

[3, 4, 7, 8, 11, 12, 14, 15, 16, 17, 19, 20, 23, 24, 27, 28, 29, 31, 32, 34, 35, 36, 39, 40, 43, 44, 46, 47, 48, 49, 51, 52, 55, 56, 58, 59, 60, 63, 64, 67, 68, 69, 71, 72, 75, 76, 78, 79, 80, 81, 83, 84, 87, 88, 91, 92, 93, 95, 96, 98, 99, 100, 103, 104, 107]

cp's OEIS Frontend

A386971 Numbers k >= 1 such that w(k-r) + ... + w(k-1) = w(k+1) + ... + w(k+r) for some r >= 1 where w(i) is the binary weight of i (A000120).

Table of values

List of values

n	a(n)
1	3
2	4
3	7
4	8
5	11
6	12
7	14
8	15
9	16
10	17
11	19
12	20
13	23
14	24
15	27
16	28
17	29
18	31
19	32
20	34
21	35
22	36
23	39
24	40
25	43
26	44
27	46
28	47
29	48
30	49
31	51
32	52
33	55
34	56
35	58
36	59
37	60
38	63
39	64
40	67
41	68
42	69
43	71
44	72
45	75
46	76
47	78
48	79
49	80
50	81
51	83
52	84
53	87
54	88
55	91
56	92
57	93
58	95
59	96
60	98
61	99
62	100
63	103
64	104
65	107

n	a(n)
1	3
2	4
3	7
4	8
5	11
6	12
7	14
8	15
9	16
10	17
11	19
12	20
13	23
14	24
15	27
16	28
17	29
18	31
19	32
20	34
21	35
22	36
23	39
24	40
25	43
26	44
27	46
28	47
29	48
30	49
31	51
32	52
33	55
34	56
35	58
36	59
37	60
38	63
39	64
40	67
41	68
42	69
43	71
44	72
45	75
46	76
47	78
48	79
49	80
50	81
51	83
52	84
53	87
54	88
55	91
56	92
57	93
58	95
59	96
60	98
61	99
62	100
63	103
64	104
65	107

n	a(n)
1	3
2	4
3	7
4	8
5	11
6	12
7	14
8	15
9	16
10	17
11	19
12	20
13	23
14	24
15	27
16	28
17	29
18	31
19	32
20	34
21	35
22	36
23	39
24	40
25	43
26	44
27	46
28	47
29	48
30	49
31	51
32	52
33	55
34	56
35	58
36	59
37	60
38	63
39	64
40	67
41	68
42	69
43	71
44	72
45	75
46	76
47	78
48	79
49	80
50	81
51	83
52	84
53	87
54	88
55	91
56	92
57	93
58	95
59	96
60	98
61	99
62	100
63	103
64	104
65	107