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 | 9 |
| 3 | 121 |
| 4 | 29929 |
| 5 | 9991921 |
| 6 | 1212919929 |
| 7 | 1929229929 |
| 8 | 1991212129 |
| 9 | 2929299129 |
| 10 | 1229129212921 |
| 11 | 92222199291121 |
| 12 | 219992999929921 |
| 13 | 99221129991291219129 |
| 14 | 2291192212129911919221121 |
| 15 | 9992221299191112291912929211222129 |
| 16 | 211192199129121999192121999211919121 |
| 17 | 21112999921929291129929211912291229929191119991929921 |