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) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 112 |
| 4 | 2240 |
| 5 | 58240 |
| 6 | 1863680 |
| 7 | 70819840 |
| 8 | 3116072960 |
| 9 | 155803648000 |
| 10 | 8725004288000 |
| 11 | 540950265856000 |
| 12 | 36784618078208000 |
| 13 | 2722061737787392000 |
| 14 | 217764939022991360000 |
| 15 | 18727784755977256960000 |
| 16 | 1722956197549907640320000 |
| 17 | 168849707359890948751360000 |