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 | 3 |
| 2 | 55 |
| 3 | 253 |
| 4 | 325 |
| 5 | 5253 |
| 6 | 255255 |
| 7 | 2235555 |
| 8 | 2355535 |
| 9 | 3252525 |
| 10 | 222552253 |
| 11 | 225323523253 |
| 12 | 33533553332223253 |
| 13 | 523355323323222253 |
| 14 | 252235353552533225335 |
| 15 | 22323332525535322225335 |
| 16 | 223533355523232355353232325353525335 |