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 | 3 |
| 3 | 12 |
| 4 | 22 |
| 5 | 73 |
| 6 | 131 |
| 7 | 428 |
| 8 | 766 |
| 9 | 2497 |
| 10 | 4467 |
| 11 | 14556 |
| 12 | 26038 |
| 13 | 84841 |
| 14 | 151763 |
| 15 | 494492 |
| 16 | 884542 |
| 17 | 2882113 |
| 18 | 5155491 |
| 19 | 16798188 |
| 20 | 30048406 |
| 21 | 97907017 |
| 22 | 175134947 |
| 23 | 570643916 |
| 24 | 1020761278 |
| 25 | 3325956481 |
| 26 | 5949432723 |
| 27 | 19385094972 |
| 28 | 34675835062 |
| 29 | 112984613353 |