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 | 8 |
| 3 | 45 |
| 4 | 544 |
| 5 | 3725 |
| 6 | 89856 |
| 7 | 858823 |
| 8 | 25271296 |
| 9 | 434776329 |
| 10 | 13241728000 |
| 11 | 285750755411 |
| 12 | 11494661861376 |
| 13 | 302956057862653 |
| 14 | 12945137688641536 |
| 15 | 446924199188379375 |
| 16 | 20735627677666902016 |
| 17 | 827246308572614396177 |
| 18 | 43155924331583693389824 |