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 | 23 |
| 3 | 456 |
| 4 | 10789 |
| 5 | 1111112345 |
| 6 | 101111226789 |
| 7 | 22222222345678 |
| 8 | 1022333333334569 |
| 9 | 102333344444445789 |
| 10 | 10234444455555556789 |
| 11 | 1023455555666666666789 |
| 12 | 102345666677777777777889 |
| 13 | 10012345677888888888889999 |
| 14 | 1000000011111122334455678999999999 |