A165819 - cp's OEIS frontend

A165819 a(n) = the smallest positive integer that, when written in binary, contains both binary n and binary 2n-1 as substrings.

n	a(n)
1	1
2	6
3	11
4	28
5	37
6	22
7	29
8	120
9	137
10	83
11	43
12	92
13	205
14	59
15	61
16	496
17	529
18	291
19	595
20	167
21	169
22	86
23	183
24	376
25	793
26	410
27	437
28	220
29	925
30	123
31	125
32	2016
33	2081
34	1091
35	2211
36	583
37	293
38	1227
39	2471
40	2536
41	2601
42	339
43	171
44	2796
45	729
46	366
47	751
48	1520
49	3121
50	1586
51	1637
52	1652

[1, 6, 11, 28, 37, 22, 29, 120, 137, 83, 43, 92, 205, 59, 61, 496, 529, 291, 595, 167, 169, 86, 183, 376, 793, 410, 437, 220, 925, 123, 125, 2016, 2081, 1091, 2211, 583, 293, 1227, 2471, 2536, 2601, 339, 171, 2796, 729, 366, 751, 1520, 3121, 1586, 1637, 1652]

cp's OEIS Frontend

A165819 a(n) = the smallest positive integer that, when written in binary, contains both binary n and binary 2n-1 as substrings.

Table of values

List of values