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 | 1 |
| 3 | 1 |
| 4 | 12 |
| 5 | 120 |
| 6 | 1208 |
| 7 | 12082 |
| 8 | 120821 |
| 9 | 1208216 |
| 10 | 12082165 |
| 11 | 120821655 |
| 12 | 1208216555 |
| 13 | 12082165556 |
| 14 | 120821655562 |
| 15 | 1208216555626 |
| 16 | 12082165556267 |
| 17 | 120821655562672 |
| 18 | 1208216555626728 |
| 19 | 12082165556267282 |
| 20 | 120821655562672822 |