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 | 1 |
| 2 | 8 |
| 3 | 49 |
| 4 | 294 |
| 5 | 1791 |
| 6 | 11087 |
| 7 | 69497 |
| 8 | 439790 |
| 9 | 2803657 |
| 10 | 17978388 |
| 11 | 115837591 |
| 12 | 749321715 |
| 13 | 4863369655 |
| 14 | 31655226107 |
| 15 | 206549749929 |
| 16 | 1350638103790 |
| 17 | 8848643946549 |
| 18 | 58069093513634 |
| 19 | 381650672631329 |
| 20 | 2511733593767294 |
| 21 | 16550500379912639 |
| 22 | 109176697072162079 |
| 23 | 720921085149563159 |