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 | 272 |
| 2 | 52736 |
| 3 | 4766048 |
| 4 | 319830400 |
| 5 | 18598875760 |
| 6 | 1002968825344 |
| 7 | 51882638754240 |
| 8 | 2621627565515520 |
| 9 | 130715075544000720 |
| 10 | 6468157990602644480 |
| 11 | 318685706549526508832 |
| 12 | 15663443488266952501376 |
| 13 | 768809642314801857986608 |