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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A320386 a(n) is the smallest positive integer such that the binary representation of n*a(n) is a "binary square" (i.e., a term of A020330).

Table of values

n a(n)
1 3
2 5
3 1
4 9
5 2
6 6
7 9
8 17
9 4
10 1
11 17
12 3
13 17
14 17
15 1
16 33
17 8
18 2
19 33
20 33
21 3
22 24
23 33
24 22
25 33
26 33
27 2
28 33
29 33
30 22
31 33
32 65
33 16
34 4
35 65
36 1
37 65
38 65
39 22
40 52
41 65
42 22
43 65
44 12
45 1
46 65
47 65
48 11
49 65
50 52
51 3
52 40
53 65
54 1
55 12
56 65
57 11
58 65
59 65
60 11
61 65
62 65
63 1
64 129
65 32
66 8
67 129
68 2
69 11
70 39

List of values

[3, 5, 1, 9, 2, 6, 9, 17, 4, 1, 17, 3, 17, 17, 1, 33, 8, 2, 33, 33, 3, 24, 33, 22, 33, 33, 2, 33, 33, 22, 33, 65, 16, 4, 65, 1, 65, 65, 22, 52, 65, 22, 65, 12, 1, 65, 65, 11, 65, 52, 3, 40, 65, 1, 12, 65, 11, 65, 65, 11, 65, 65, 1, 129, 32, 8, 129, 2, 11, 39]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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