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) |
|---|---|
| 5 | 10 |
| 6 | 58 |
| 7 | 340 |
| 8 | 2014 |
| 9 | 11888 |
| 10 | 69274 |
| 11 | 401648 |
| 12 | 2329526 |
| 13 | 13514794 |
| 14 | 78445016 |
| 15 | 455726404 |
| 16 | 2650463368 |
| 17 | 15433424116 |
| 18 | 89977250572 |
| 19 | 525210971550 |
| 20 | 3069436719818 |
| 21 | 17959557595206 |
| 22 | 105203403819650 |
| 23 | 616942677047888 |
| 24 | 3621795968081798 |
| 25 | 21283870741193560 |
| 26 | 125201162038738596 |