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 | 4 |
| 2 | 100 |
| 3 | 4884 |
| 4 | 315124 |
| 5 | 23738426 |
| 6 | 1989679315 |
| 7 | 181330154458 |
| 8 | 17720685250743 |
| 9 | 1838270364212150 |
| 10 | 200766237618388230 |
| 11 | 22925992371163981667 |
| 12 | 2721355255765297425689 |