cp's OEIS Frontend

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.

A151980 Numbers n such that n^2 - n is divisible by 20.

Table of values

n a(n)
1 0
2 1
3 5
4 16
5 20
6 21
7 25
8 36
9 40
10 41
11 45
12 56
13 60
14 61
15 65
16 76
17 80
18 81
19 85
20 96
21 100
22 101
23 105
24 116
25 120
26 121
27 125
28 136
29 140
30 141
31 145
32 156
33 160
34 161
35 165
36 176
37 180
38 181
39 185
40 196
41 200
42 201
43 205
44 216
45 220
46 221
47 225
48 236
49 240
50 241
51 245
52 256
53 260
54 261
55 265
56 276
57 280
58 281
59 285
60 296

List of values

[0, 1, 5, 16, 20, 21, 25, 36, 40, 41, 45, 56, 60, 61, 65, 76, 80, 81, 85, 96, 100, 101, 105, 116, 120, 121, 125, 136, 140, 141, 145, 156, 160, 161, 165, 176, 180, 181, 185, 196, 200, 201, 205, 216, 220, 221, 225, 236, 240, 241, 245, 256, 260, 261, 265, 276, 280, 281, 285, 296]

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

Content is available under The OEIS End-User License Agreement.