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 | 0 |
| 2 | 4 |
| 3 | 88 |
| 4 | 868 |
| 5 | 4554 |
| 6 | 8008 |
| 7 | 45154 |
| 8 | 89698 |
| 9 | 452254 |
| 10 | 4526254 |
| 11 | 8996998 |
| 12 | 830333038 |
| 13 | 862626268 |
| 14 | 899969998 |
| 15 | 4058008504 |
| 16 | 45032023054 |
| 17 | 45229592254 |
| 18 | 89999699998 |
| 19 | 405485584504 |
| 20 | 4503764673054 |
| 21 | 8187727277818 |
| 22 | 8999996999998 |
| 23 | 89178266287198 |
| 24 | 455467838764554 |
| 25 | 833066101660338 |