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 | 4 |
| 2 | 80 |
| 3 | 568 |
| 4 | 2024 |
| 5 | 6052 |
| 6 | 12144 |
| 7 | 26976 |
| 8 | 45024 |
| 9 | 76724 |
| 10 | 116840 |
| 11 | 191128 |
| 12 | 245976 |
| 13 | 388452 |
| 14 | 501888 |
| 15 | 661476 |
| 16 | 870168 |
| 17 | 1199724 |
| 18 | 1402096 |
| 19 | 1911384 |
| 20 | 2188320 |
| 21 | 2739280 |
| 22 | 3371264 |
| 23 | 4224288 |
| 24 | 4617224 |
| 25 | 5801372 |
| 26 | 6780568 |