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 | 1 |
| 1 | 32 |
| 2 | 360 |
| 3 | 2400 |
| 4 | 11550 |
| 5 | 44352 |
| 6 | 144144 |
| 7 | 411840 |
| 8 | 1061775 |
| 9 | 2516800 |
| 10 | 5562128 |
| 11 | 11583936 |
| 12 | 22926540 |
| 13 | 43411200 |
| 14 | 79070400 |
| 15 | 139163904 |
| 16 | 237557133 |
| 17 | 394558560 |
| 18 | 639331000 |
| 19 | 1013012000 |
| 20 | 1572701130 |
| 21 | 2396496960 |
| 22 | 3589794000 |
| 23 | 5293080000 |
| 24 | 7691506875 |
| 25 | 11026544256 |
| 26 | 15610063392 |