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 | 45 |
| 2 | 55 |
| 3 | 25425 |
| 4 | 255255 |
| 5 | 22542255 |
| 6 | 244525555 |
| 7 | 2245524452445 |
| 8 | 2445254445525 |
| 9 | 5255545252454245 |
| 10 | 444222245455224445 |
| 11 | 4544525455555255444225 |
| 12 | 5554545454254522254255544522452525245 |