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 | 34 |
| 2 | 1870 |
| 3 | 83215 |
| 4 | 3994320 |
| 5 | 186135312 |
| 6 | 8771626578 |
| 7 | 411591708660 |
| 8 | 19344810307020 |
| 9 | 908637119420910 |
| 10 | 42689423937884208 |
| 11 | 2005443612183077232 |
| 12 | 94214069697350815795 |
| 13 | 4426039514623184676790 |
| 14 | 207929935924379904006970 |
| 15 | 9768275694729434277258589 |
| 16 | 458901121999204061365680096 |