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 | 2 |
| 2 | 3 |
| 3 | 8 |
| 4 | 19 |
| 5 | 65 |
| 6 | 84 |
| 7 | 485 |
| 8 | 1054 |
| 9 | 24727 |
| 10 | 50508 |
| 11 | 125743 |
| 12 | 176251 |
| 13 | 301994 |
| 14 | 16785921 |
| 15 | 17087915 |
| 16 | 85137581 |
| 17 | 272500658 |
| 18 | 357638239 |
| 19 | 630138897 |
| 20 | 9809721694 |
| 21 | 10439860591 |
| 22 | 103768467013 |
| 23 | 217976794617 |
| 24 | 1193652440098 |
| 25 | 8573543875303 |