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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 9 |
| 6 | 121 |
| 7 | 17161 |
| 8 | 298978681 |
| 9 | 9933176210033041 |
| 10 | 815437979830770470704295274609 |
| 11 | 38747106750801481775941360512378545527545442200632960401 |