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 | 9 |
| 1 | 19 |
| 2 | 28 |
| 3 | 47 |
| 4 | 75 |
| 5 | 197 |
| 6 | 3621 |
| 7 | 7439 |
| 8 | 11060 |
| 9 | 18499 |
| 10 | 29559 |
| 11 | 77617 |
| 12 | 1426665 |
| 13 | 2930947 |
| 14 | 4357612 |
| 15 | 7288559 |
| 16 | 11646171 |
| 17 | 30580901 |
| 18 | 562102389 |
| 19 | 1154785679 |
| 20 | 1716888068 |
| 21 | 2871673747 |
| 22 | 4588561815 |
| 23 | 12048797377 |
| 24 | 221466914601 |