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 | 10 |
| 2 | 95 |
| 3 | 920 |
| 4 | 9135 |
| 5 | 92752 |
| 6 | 959595 |
| 7 | 10084360 |
| 8 | 107375730 |
| 9 | 1156073100 |
| 10 | 12565671261 |
| 11 | 137702922560 |
| 12 | 1519842008360 |
| 13 | 16880051620320 |
| 14 | 188519028884675 |
| 15 | 2115822959020080 |
| 16 | 23851913523156675 |
| 17 | 269958280013904870 |
| 18 | 3066451080298820830 |
| 19 | 34946186787944832400 |