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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.

A375019 Positive integers n such that (1, n^2 - 1, n^2) is an abc triple.

Table of values

n a(n)
1 3
2 7
3 8
4 9
5 15
6 17
7 25
8 26
9 27
10 31
11 48
12 49
13 55
14 63
15 64
16 80
17 81
18 97
19 99
20 125
21 127
22 161
23 224
24 225
25 242
26 243
27 244
28 251
29 255
30 288
31 289
32 325
33 343
34 351
35 361
36 449
37 485
38 487
39 511
40 512
41 513
42 575
43 577
44 624
45 625
46 649
47 675
48 676
49 687
50 721
51 728
52 729
53 783
54 960
55 961
56 999

List of values

[3, 7, 8, 9, 15, 17, 25, 26, 27, 31, 48, 49, 55, 63, 64, 80, 81, 97, 99, 125, 127, 161, 224, 225, 242, 243, 244, 251, 255, 288, 289, 325, 343, 351, 361, 449, 485, 487, 511, 512, 513, 575, 577, 624, 625, 649, 675, 676, 687, 721, 728, 729, 783, 960, 961, 999]