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 | 0 |
| 2 | 0 |
| 3 | 20 |
| 4 | 330 |
| 5 | 1224 |
| 6 | 2726 |
| 7 | 4807 |
| 8 | 7458 |
| 9 | 10679 |
| 10 | 14470 |
| 11 | 18831 |
| 12 | 23762 |
| 13 | 29263 |
| 14 | 35334 |
| 15 | 41975 |
| 16 | 49186 |
| 17 | 56967 |
| 18 | 65318 |
| 19 | 74239 |
| 20 | 83730 |
| 21 | 93791 |
| 22 | 104422 |
| 23 | 115623 |
| 24 | 127394 |
| 25 | 139735 |
| 26 | 152646 |
| 27 | 166127 |
| 28 | 180178 |
| 29 | 194799 |
| 30 | 209990 |
| 31 | 225751 |
| 32 | 242082 |
| 33 | 258983 |
| 34 | 276454 |
| 35 | 294495 |