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 | 230 |
| 3 | 23548 |
| 4 | 4675014 |
| 5 | 1527092468 |
| 6 | 743288515164 |
| 7 | 504541774904760 |
| 8 | 455522635895576646 |
| 9 | 527896878148304296900 |
| 10 | 763820398700983273655796 |
| 11 | 1349622683586635111555174216 |
| 12 | 2859794140516672651686471055900 |
| 13 | 7157996663278223282076538528360968 |