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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.

A331961 a(n) is the greatest square number k such that n AND k = k (where AND denotes the bitwise AND operator).

Table of values

n a(n)
0 0
1 1
2 0
3 1
4 4
5 4
6 4
7 4
8 0
9 9
10 0
11 9
12 4
13 9
14 4
15 9
16 16
17 16
18 16
19 16
20 16
21 16
22 16
23 16
24 16
25 25
26 16
27 25
28 16
29 25
30 16
31 25
32 0
33 1
34 0
35 1
36 36
37 36
38 36
39 36
40 0
41 9
42 0
43 9
44 36
45 36
46 36
47 36
48 16
49 49
50 16
51 49
52 36
53 49
54 36
55 49
56 16
57 49
58 16
59 49
60 36
61 49
62 36
63 49
64 64
65 64
66 64
67 64
68 64
69 64
70 64

List of values

[0, 1, 0, 1, 4, 4, 4, 4, 0, 9, 0, 9, 4, 9, 4, 9, 16, 16, 16, 16, 16, 16, 16, 16, 16, 25, 16, 25, 16, 25, 16, 25, 0, 1, 0, 1, 36, 36, 36, 36, 0, 9, 0, 9, 36, 36, 36, 36, 16, 49, 16, 49, 36, 49, 36, 49, 16, 49, 16, 49, 36, 49, 36, 49, 64, 64, 64, 64, 64, 64, 64]

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

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