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 | 0 |
| 1 | 3 |
| 2 | 318 |
| 3 | 49497 |
| 4 | 1593176614 |
| 5 | 306347668831 |
| 6 | 13663408341818193 |
| 7 | 657273036441106021420 |
| 8 | 1725515775006035094342654787041 |
| 9 | 397951747550111200113555298627327 |