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 | 5 |
| 4 | 9 |
| 5 | 15 |
| 6 | 21 |
| 7 | 96 |
| 8 | 99 |
| 9 | 259 |
| 10 | 1317 |
| 11 | 2112 |
| 12 | 52711 |
| 13 | 72483 |
| 14 | 124069 |
| 15 | 633696 |
| 16 | 651632 |
| 17 | 2391984 |
| 18 | 4317312 |
| 19 | 8101536 |
| 20 | 8344672 |