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 | 24 |
| 2 | 552 |
| 3 | 12696 |
| 4 | 292008 |
| 5 | 6716184 |
| 6 | 154472232 |
| 7 | 3552861060 |
| 8 | 81715798032 |
| 9 | 1879463209008 |
| 10 | 43227650455440 |
| 11 | 994235883385008 |
| 12 | 22867423544782608 |
| 13 | 525950700749330736 |
| 14 | 12096865179279290124 |
| 15 | 278227877550453062232 |