A295827 - cp's OEIS frontend

A295827 a(n) = least odd k > 1 such that n and n*k have the same Hamming weight, or -1 if no such k exists.

n	a(n)
1	-1
2	-1
3	3
4	-1
5	13
6	3
7	3
8	-1
9	57
10	13
11	35
12	3
13	21
14	3
15	3
16	-1
17	241
18	57
19	7
20	13
21	13
22	35
23	39
24	3
25	169
26	21
27	5
28	3
29	21
30	3
31	3
32	-1
33	993
34	241
35	11
36	57
37	7
38	7
39	5
40	13
41	3197
42	13
43	9
44	35
45	3
46	39
47	13
48	3
49	21
50	169
51	3
52	21
53	39
54	5
55	47
56	3
57	27
58	21
59	5
60	3
61	13
62	3
63	3
64	-1
65	4033
66	993
67	491
68	241

[-1, -1, 3, -1, 13, 3, 3, -1, 57, 13, 35, 3, 21, 3, 3, -1, 241, 57, 7, 13, 13, 35, 39, 3, 169, 21, 5, 3, 21, 3, 3, -1, 993, 241, 11, 57, 7, 7, 5, 13, 3197, 13, 9, 35, 3, 39, 13, 3, 21, 169, 3, 21, 39, 5, 47, 3, 27, 21, 5, 3, 13, 3, 3, -1, 4033, 993, 491, 241]

cp's OEIS Frontend

A295827 a(n) = least odd k > 1 such that n and n*k have the same Hamming weight, or -1 if no such k exists.

Table of values

List of values