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 | 4 |
| 2 | 49 |
| 3 | 301 |
| 4 | 589 |
| 5 | 973 |
| 6 | 2353 |
| 7 | 2701 |
| 8 | 3073 |
| 9 | 4333 |
| 10 | 5293 |
| 11 | 5809 |
| 12 | 6349 |
| 13 | 6913 |
| 14 | 7501 |
| 15 | 8749 |
| 16 | 9409 |
| 17 | 10801 |
| 18 | 11533 |
| 19 | 13069 |
| 20 | 14701 |
| 21 | 15553 |
| 22 | 16429 |
| 23 | 23233 |
| 24 | 24301 |
| 25 | 25393 |
| 26 | 27649 |
| 27 | 30001 |