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) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 8 |
| 4 | 17 |
| 5 | 98 |
| 6 | 362 |
| 7 | 1916 |
| 8 | 9512 |
| 9 | 53858 |
| 10 | 315872 |
| 11 | 1984979 |
| 12 | 13105685 |
| 13 | 91128546 |
| 14 | 663815424 |
| 15 | 5055622309 |
| 16 | 40148341135 |
| 17 | 331753228115 |
| 18 | 2846786927873 |
| 19 | 25323311882074 |
| 20 | 233137061978065 |
| 21 | 2218141402504254 |
| 22 | 21780561656373552 |
| 23 | 220451321425101091 |
| 24 | 2297330116404668422 |