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 | 4 |
| 3 | 6 |
| 4 | 19 |
| 5 | 56 |
| 6 | 369 |
| 7 | 796 |
| 8 | 1146 |
| 9 | 1156 |
| 10 | 3656 |
| 11 | 8131 |
| 12 | 19056 |
| 13 | 40204 |
| 14 | 81619 |
| 15 | 258131 |
| 16 | 5624381 |
| 17 | 24762131 |
| 18 | 362789631 |
| 19 | 1079982019 |
| 20 | 11666754546 |
| 21 | 562726517354 |
| 22 | 3337114272296 |
| 23 | 5624644998854 |
| 24 | 18266544874814631 |
| 25 | 11537606482136410218512760694 |