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.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 24 |
| 4 | 42 |
| 5 | 48 |
| 6 | 86 |
| 7 | 102 |
| 8 | 138 |
| 9 | 182 |
| 10 | 302 |
| 11 | 438 |
| 12 | 506 |
| 13 | 926 |
| 14 | 1266 |
| 15 | 3600 |
| 16 | 23550 |
| 17 | 24122 |
| 18 | 42410 |
| 19 | 51432 |
| 20 | 82290 |
| 21 | 137246 |