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 | 480 |
| 2 | 61920 |
| 3 | 1050240 |
| 4 | 7926240 |
| 5 | 37500480 |
| 6 | 135480960 |
| 7 | 395301120 |
| 8 | 1014559200 |
| 9 | 2296875360 |
| 10 | 4837561920 |
| 11 | 9353842560 |
| 12 | 17342613120 |
| 13 | 30119288640 |
| 14 | 50993844480 |
| 15 | 82051050240 |
| 16 | 129863578080 |
| 17 | 196962563520 |