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 | 19 |
| 2 | 342 |
| 3 | 5985 |
| 4 | 104652 |
| 5 | 1828503 |
| 6 | 31947930 |
| 7 | 558187605 |
| 8 | 9752543136 |
| 9 | 170394389307 |
| 10 | 2977095147966 |
| 11 | 52015183033833 |
| 12 | 908798387526612 |
| 13 | 15878335141888767 |
| 14 | 277422946995884994 |
| 15 | 4847075643050582301 |