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 | 26 |
| 2 | 485 |
| 3 | 8175 |
| 4 | 134449 |
| 5 | 2231012 |
| 6 | 37972304 |
| 7 | 668566300 |
| 8 | 12230426076 |
| 9 | 232959299496 |
| 10 | 4623952866312 |
| 11 | 95644160132976 |
| 12 | 2060772784375824 |
| 13 | 46219209678691200 |
| 14 | 1078100893671811200 |
| 15 | 26129183717351462400 |
| 16 | 657337657573760947200 |
| 17 | 17147815411007234188800 |