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) |
|---|---|
| 3 | 9 |
| 4 | 64 |
| 5 | 326 |
| 6 | 1433 |
| 7 | 5799 |
| 8 | 22224 |
| 9 | 81987 |
| 10 | 293987 |
| 11 | 1031298 |
| 12 | 3555085 |
| 13 | 12081775 |
| 14 | 40576240 |
| 15 | 134919788 |
| 16 | 444805274 |
| 17 | 1455645411 |
| 18 | 4733022100 |
| 19 | 15302145060 |
| 20 | 49223709597 |
| 21 | 157629612076 |
| 22 | 502736717207 |
| 23 | 1597541346522 |
| 24 | 5059625685739 |
| 25 | 15975936032821 |
| 26 | 50304490599602 |