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 | 10 |
| 2 | -135 |
| 3 | -5230 |
| 4 | -50895 |
| 5 | -229574 |
| 6 | 91945 |
| 7 | 13722370 |
| 8 | 197581665 |
| 9 | 2314900970 |
| 10 | 25837424601 |
| 11 | 285097311730 |
| 12 | 3137998395025 |
| 13 | 34521896413210 |
| 14 | 379748357794185 |
| 15 | 4177245606525026 |
| 16 | 45949725568604865 |
| 17 | 505447021523536330 |