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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.

A180497 a(n)=n^2-3*floor[n/sqrt(3)]^2.

Table of values

n a(n)
1 1
2 1
3 6
4 4
5 13
6 9
7 1
8 16
9 6
10 25
11 13
12 36
13 22
14 4
15 33
16 13
17 46
18 24
19 61
20 37
21 9
22 52
23 22
24 69
25 37
26 1
27 54
28 16
29 73
30 33
31 94
32 52
33 6
34 73
35 25
36 96
37 46
38 121
39 69
40 13
41 94
42 36
43 121
44 61
45 150
46 88
47 22
48 117
49 49
50 148
51 78
52 4
53 109
54 33
55 142
56 64
57 177
58 97
59 13
60 132
61 46
62 169
63 81
64 208
65 118
66 24
67 157
68 61
69 198

List of values

[1, 1, 6, 4, 13, 9, 1, 16, 6, 25, 13, 36, 22, 4, 33, 13, 46, 24, 61, 37, 9, 52, 22, 69, 37, 1, 54, 16, 73, 33, 94, 52, 6, 73, 25, 96, 46, 121, 69, 13, 94, 36, 121, 61, 150, 88, 22, 117, 49, 148, 78, 4, 109, 33, 142, 64, 177, 97, 13, 132, 46, 169, 81, 208, 118, 24, 157, 61, 198]

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

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