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 | 99 |
| 2 | 546 |
| 3 | 3010 |
| 4 | 16594 |
| 5 | 91482 |
| 6 | 504337 |
| 7 | 2780392 |
| 8 | 15328203 |
| 9 | 84503842 |
| 10 | 465866699 |
| 11 | 2568306672 |
| 12 | 14158984054 |
| 13 | 78057979457 |
| 14 | 430330886291 |
| 15 | 2372398990909 |
| 16 | 13078951921338 |
| 17 | 72103800421506 |
| 18 | 397505707375713 |
| 19 | 2191434937861300 |