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 | 5 |
| 3 | 16 |
| 4 | 41 |
| 5 | 102 |
| 6 | 242 |
| 7 | 558 |
| 8 | 1263 |
| 9 | 2817 |
| 10 | 6214 |
| 11 | 13583 |
| 12 | 29471 |
| 13 | 63548 |
| 14 | 136305 |
| 15 | 291019 |
| 16 | 618849 |
| 17 | 1311314 |
| 18 | 2769847 |
| 19 | 5834119 |
| 20 | 12257072 |
| 21 | 25691785 |
| 22 | 53738815 |
| 23 | 112188059 |
| 24 | 233796875 |
| 25 | 486435094 |
| 26 | 1010552580 |
| 27 | 2096469429 |
| 28 | 4343666482 |