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 | 1 |
| 2 | 4 |
| 3 | 9 |
| 4 | 21 |
| 5 | 24 |
| 6 | 34 |
| 7 | 56 |
| 8 | 66 |
| 9 | 92 |
| 10 | 100 |
| 11 | 112 |
| 12 | 117 |
| 13 | 135 |
| 14 | 180 |
| 15 | 260 |
| 16 | 349 |
| 17 | 387 |
| 18 | 393 |
| 19 | 411 |
| 20 | 574 |
| 21 | 617 |
| 22 | 787 |
| 23 | 1209 |