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) |
|---|---|
| 6 | 455 |
| 7 | 1275 |
| 8 | 3473 |
| 9 | 9289 |
| 10 | 24610 |
| 11 | 65209 |
| 12 | 173111 |
| 13 | 457965 |
| 14 | 1209129 |
| 15 | 3188384 |
| 16 | 8398593 |
| 17 | 22099695 |
| 18 | 58093331 |
| 19 | 152580223 |
| 20 | 400447410 |
| 21 | 1050268035 |
| 22 | 2752906205 |
| 23 | 7211859945 |
| 24 | 18883970399 |
| 25 | 49425546206 |
| 26 | 129312763273 |
| 27 | 338205545317 |
| 28 | 884270902713 |
| 29 | 2311369612471 |
| 30 | 6040120271440 |