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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 24 |
| 3 | 228 |
| 4 | 904 |
| 5 | 2788 |
| 6 | 5880 |
| 7 | 13008 |
| 8 | 22120 |
| 9 | 37976 |
| 10 | 58584 |
| 11 | 95472 |
| 12 | 125016 |
| 13 | 195816 |
| 14 | 255064 |
| 15 | 337916 |
| 16 | 444760 |
| 17 | 611760 |
| 18 | 719800 |
| 19 | 978388 |
| 20 | 1127088 |
| 21 | 1411756 |
| 22 | 1736776 |
| 23 | 2174584 |
| 24 | 2389552 |
| 25 | 2995336 |
| 26 | 3504768 |