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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 14 |
| 5 | 87 |
| 6 | 362 |
| 7 | 449 |
| 8 | 811 |
| 9 | 1260 |
| 10 | 23491 |
| 11 | 24751 |
| 12 | 48242 |
| 13 | 72993 |
| 14 | 340214 |
| 15 | 2114277 |
| 16 | 8797322 |
| 17 | 10911599 |
| 18 | 19708921 |
| 19 | 30620520 |
| 20 | 570878281 |
| 21 | 601498801 |
| 22 | 1172377082 |
| 23 | 1773875883 |
| 24 | 8267880614 |
| 25 | 51381159567 |
| 26 | 213792518882 |
| 27 | 265173678449 |
| 28 | 478966197331 |
| 29 | 744139875780 |