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 | 3552861336 |
| 8 | 81715810452 |
| 9 | 1879463634048 |
| 10 | 43227663437376 |
| 11 | 994236255707904 |
| 12 | 22867433804191680 |
| 13 | 525950975723336064 |
| 14 | 12096872400856060224 |
| 15 | 278228064281733992448 |