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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.

A292144 a(n) is the greatest k < n such that k*n is square.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 0
6 0
7 0
8 2
9 4
10 0
11 0
12 3
13 0
14 0
15 0
16 9
17 0
18 8
19 0
20 5
21 0
22 0
23 0
24 6
25 16
26 0
27 12
28 7
29 0
30 0
31 0
32 18
33 0
34 0
35 0
36 25
37 0
38 0
39 0
40 10
41 0
42 0
43 0
44 11
45 20
46 0
47 0
48 27
49 36
50 32
51 0
52 13
53 0
54 24
55 0
56 14
57 0
58 0
59 0
60 15
61 0
62 0
63 28
64 49
65 0
66 0
67 0
68 17
69 0
70 0
71 0
72 50
73 0
74 0
75 48
76 19
77 0
78 0
79 0
80 45

List of values

[0, 0, 0, 1, 0, 0, 0, 2, 4, 0, 0, 3, 0, 0, 0, 9, 0, 8, 0, 5, 0, 0, 0, 6, 16, 0, 12, 7, 0, 0, 0, 18, 0, 0, 0, 25, 0, 0, 0, 10, 0, 0, 0, 11, 20, 0, 0, 27, 36, 32, 0, 13, 0, 24, 0, 14, 0, 0, 0, 15, 0, 0, 28, 49, 0, 0, 0, 17, 0, 0, 0, 50, 0, 0, 48, 19, 0, 0, 0, 45]

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