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 | 35 |
| 2 | 105 |
| 3 | 315 |
| 4 | 889 |
| 5 | 2567 |
| 6 | 7483 |
| 7 | 21631 |
| 8 | 62547 |
| 9 | 181255 |
| 10 | 524877 |
| 11 | 1519408 |
| 12 | 4399720 |
| 13 | 12740155 |
| 14 | 36888358 |
| 15 | 106810847 |
| 16 | 309276700 |
| 17 | 895517750 |
| 18 | 2592992001 |
| 19 | 7508089778 |
| 20 | 21739889599 |
| 21 | 62948442860 |
| 22 | 182269006155 |
| 23 | 527765093824 |
| 24 | 1528158677522 |