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 | 2 |
| 1 | 20 |
| 2 | 202 |
| 3 | 2040 |
| 4 | 20602 |
| 5 | 208060 |
| 6 | 2101202 |
| 7 | 21220080 |
| 8 | 214302002 |
| 9 | 2164240100 |
| 10 | 21856703002 |
| 11 | 220731270120 |
| 12 | 2229169404202 |
| 13 | 22512425312140 |
| 14 | 227353422525602 |
| 15 | 2296046650568160 |
| 16 | 23187819928207202 |
| 17 | 234174245932640180 |