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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.

A180498 a(n) = n^2 - 5*floor(n/sqrt(5))^2.

Table of values

n a(n)
1 1
2 4
3 4
4 11
5 5
6 16
7 4
8 19
9 1
10 20
11 41
12 19
13 44
14 16
15 45
16 11
17 44
18 4
19 41
20 80
21 36
22 79
23 29
24 76
25 20
26 71
27 9
28 64
29 121
30 55
31 116
32 44
33 109
34 31
35 100
36 16
37 89
38 164
39 76
40 155
41 61
42 144
43 44
44 131
45 25
46 116
47 4
48 99
49 196
50 80
51 181
52 59
53 164
54 36
55 145
56 11
57 124
58 239
59 101
60 220
61 76
62 199
63 49
64 176
65 20
66 151

List of values

[1, 4, 4, 11, 5, 16, 4, 19, 1, 20, 41, 19, 44, 16, 45, 11, 44, 4, 41, 80, 36, 79, 29, 76, 20, 71, 9, 64, 121, 55, 116, 44, 109, 31, 100, 16, 89, 164, 76, 155, 61, 144, 44, 131, 25, 116, 4, 99, 196, 80, 181, 59, 164, 36, 145, 11, 124, 239, 101, 220, 76, 199, 49, 176, 20, 151]

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

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