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 | 11 |
| 2 | 212 |
| 3 | 3123 |
| 4 | 41234 |
| 5 | 512345 |
| 6 | 6123456 |
| 7 | 71234567 |
| 8 | 812345678 |
| 9 | 9123456789 |
| 10 | 1012345678910 |
| 11 | 111234567891011 |
| 12 | 12123456789101112 |
| 13 | 1312345678910111213 |
| 14 | 141234567891011121314 |
| 15 | 15123456789101112131415 |
| 16 | 1612345678910111213141516 |