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 | 3 |
| 3 | 10 |
| 4 | 28 |
| 5 | 36 |
| 6 | 91 |
| 7 | 1081 |
| 8 | 2278 |
| 9 | 2926 |
| 10 | 8001 |
| 11 | 46665 |
| 12 | 5639761 |
| 13 | 10911456 |
| 14 | 166066200 |
| 15 | 341532180 |
| 16 | 3137785371 |
| 17 | 1647882316985625 |
| 18 | 875366737297292691171 |
| 19 | 465198187808352499674075441 |