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) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 49 |
| 3 | 493 |
| 4 | 4953 |
| 5 | 49856 |
| 6 | 499735 |
| 7 | 4999579 |
| 8 | 49998058 |
| 9 | 499987392 |
| 10 | 4999941987 |
| 11 | 49999828888 |
| 12 | 499999738687 |
| 13 | 4999999516711 |