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 | 23 |
| 3 | 899 |
| 4 | 85072 |
| 5 | 15120411 |
| 6 | 4439935299 |
| 7 | 1989537541918 |
| 8 | 1264044973158281 |
| 9 | 1090056235155152713 |
| 10 | 1227540523199054294506 |