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 | -1346 |
| 3 | -124560 |
| 4 | 4771596 |
| 5 | 1072135584 |
| 6 | -20123783544 |
| 7 | -12846838359744 |
| 8 | -37578736832880 |
| 9 | 196631096935434624 |
| 10 | 5369183316185589216 |
| 11 | -3650389283510599332096 |
| 12 | -201124616475050111174976 |
| 13 | 79365587639487260327262720 |
| 14 | 6930073770593296325672255616 |