A165820 - cp's OEIS frontend

A165820 a(n) = the smallest positive integer that, when written in binary, contains both binary n and binary n^2 as substrings.

n	a(n)
1	1
2	4
3	19
4	16
5	89
6	100
7	113
8	64
9	593
10	1380
11	377
12	400
13	425
14	452
15	481
16	256
17	4385
18	1298
19	723
20	10640
21	5561
22	11748
23	8471
24	18456
25	1649
26	1700
27	729
28	1808
29	1865
30	1924
31	1985
32	1024
33	33857
34	9250
35	36041
36	75024
37	5477
38	11558
39	40433
40	83520
41	1681
42	87780
43	22329
44	92048

[1, 4, 19, 16, 89, 100, 113, 64, 593, 1380, 377, 400, 425, 452, 481, 256, 4385, 1298, 723, 10640, 5561, 11748, 8471, 18456, 1649, 1700, 729, 1808, 1865, 1924, 1985, 1024, 33857, 9250, 36041, 75024, 5477, 11558, 40433, 83520, 1681, 87780, 22329, 92048]

cp's OEIS Frontend

A165820 a(n) = the smallest positive integer that, when written in binary, contains both binary n and binary n^2 as substrings.

Table of values

List of values