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 | 2 |
| 2 | 9 |
| 3 | 84 |
| 4 | 1625 |
| 5 | 64350 |
| 6 | 5174449 |
| 7 | 841185704 |
| 8 | 275723872209 |
| 9 | 181906966455026 |
| 10 | 241258554545388985 |
| 11 | 642662865556736504700 |
| 12 | 3436011253857466940820073 |
| 13 | 36852501476559726217536067974 |
| 14 | 792571351187806816558255494473185 |