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.

A348139 Three-digit numbers abc such that the quadratic equation ax^2 + bx + c = 0 has a rational root.

Table of values

n a(n)
1 100
2 110
3 120
4 121
5 130
6 132
7 140
8 143
9 144
10 150
11 154
12 156
13 160
14 165
15 168
16 169
17 170
18 176
19 180
20 187
21 190
22 198
23 200
24 210
25 220
26 230
27 231
28 240
29 242
30 250
31 252
32 253
33 260
34 264
35 270
36 273
37 275
38 276
39 280
40 286
41 288
42 290
43 294
44 297
45 299
46 300
47 310
48 320
49 330
50 340
51 341
52 350
53 352
54 360
55 363
56 370
57 372
58 374
59 380
60 384
61 385
62 390
63 396
64 400
65 410
66 420
67 430
68 440
69 441
70 450
71 451
72 460
73 462
74 470

List of values

[100, 110, 120, 121, 130, 132, 140, 143, 144, 150, 154, 156, 160, 165, 168, 169, 170, 176, 180, 187, 190, 198, 200, 210, 220, 230, 231, 240, 242, 250, 252, 253, 260, 264, 270, 273, 275, 276, 280, 286, 288, 290, 294, 297, 299, 300, 310, 320, 330, 340, 341, 350, 352, 360, 363, 370, 372, 374, 380, 384, 385, 390, 396, 400, 410, 420, 430, 440, 441, 450, 451, 460, 462, 470]