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 | 0 |
| 2 | 8 |
| 3 | 8 |
| 4 | 120 |
| 5 | 288 |
| 6 | 2360 |
| 7 | 8632 |
| 8 | 55224 |
| 9 | 249656 |
| 10 | 1443128 |
| 11 | 7243552 |
| 12 | 40366040 |
| 13 | 213357880 |
| 14 | 1178216264 |
| 15 | 6395922296 |
| 16 | 35375108728 |
| 17 | 194951335888 |