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 | 1152 |
| 3 | 82944 |
| 4 | 7962624 |
| 5 | 955514880 |
| 6 | 137594142720 |
| 7 | 23115815976960 |
| 8 | 4438236667576320 |
| 9 | 958659120196485120 |
| 10 | 230078188847156428800 |
| 11 | 60740641855649297203200 |
| 12 | 17493304854426997594521600 |
| 13 | 5457911114581223249490739200 |
| 14 | 1833858134499291011828888371200 |
| 15 | 660188928419744764258399813632000 |