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 | 6 |
| 2 | 56 |
| 3 | 6016 |
| 4 | 72318976 |
| 5 | 10460064284409856 |
| 6 | 218825889667954898996994670329856 |
| 7 | 95769539977943941232017762100658986141884645207653888255921750016 |