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 | 19 |
| 2 | 201 |
| 3 | 2059 |
| 4 | 21201 |
| 5 | 220099 |
| 6 | 2303001 |
| 7 | 24270139 |
| 8 | 257405601 |
| 9 | 2745368179 |
| 10 | 29424209001 |
| 11 | 316692730219 |
| 12 | 3420857913201 |
| 13 | 37064577972259 |
| 14 | 402626626038201 |
| 15 | 4383139301510299 |
| 16 | 47802750052424001 |
| 17 | 522124210198960339 |