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) |
|---|---|
| 1 | 8 |
| 2 | 56 |
| 3 | 344 |
| 4 | 2312 |
| 5 | 14648 |
| 6 | 96152 |
| 7 | 622616 |
| 8 | 4066376 |
| 9 | 26456024 |
| 10 | 172470776 |
| 11 | 1124590904 |
| 12 | 7328945336 |
| 13 | 47829176312 |
| 14 | 311758824440 |
| 15 | 2035191240584 |
| 16 | 13269735071816 |
| 17 | 86634355605416 |
| 18 | 565037351668904 |