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 | 36 |
| 3 | 738 |
| 4 | 8240 |
| 5 | 57675 |
| 6 | 289716 |
| 7 | 1144836 |
| 8 | 3780288 |
| 9 | 10865205 |
| 10 | 27969700 |
| 11 | 65834406 |
| 12 | 143887536 |
| 13 | 295467263 |
| 14 | 575308020 |
| 15 | 1069960200 |
| 16 | 1911933696 |
| 17 | 3298486761 |
| 18 | 5516122788 |
| 19 | 8972008810 |
| 20 | 14233690800 |
| 21 | 22078652211 |
| 22 | 33555443636 |
| 23 | 50058302988 |
| 24 | 73417387200 |
| 25 | 106006948125 |