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 | 7 |
| 1 | 336 |
| 2 | 7392 |
| 3 | 109824 |
| 4 | 1281280 |
| 5 | 12673024 |
| 6 | 111132672 |
| 7 | 889061376 |
| 8 | 6615662592 |
| 9 | 46425702400 |
| 10 | 310388981760 |
| 11 | 1992378286080 |
| 12 | 12352745373696 |
| 13 | 74327630282752 |
| 14 | 435713694760960 |
| 15 | 2496217812566016 |
| 16 | 14012859084177408 |
| 17 | 77247357640507392 |