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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 2240 |
| 6 | 35840 |
| 7 | 433040 |
| 8 | 4862560 |
| 9 | 51759280 |
| 10 | 527313040 |
| 11 | 5218528800 |
| 12 | 50434399280 |
| 13 | 478624474160 |
| 14 | 4473452644480 |