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) |
|---|---|
| 4 | 24 |
| 5 | 7960 |
| 6 | 240480 |
| 7 | 2934568 |
| 8 | 21663936 |
| 9 | 115970400 |
| 10 | 495329520 |
| 11 | 1787153280 |
| 12 | 5652862776 |
| 13 | 16082870232 |
| 14 | 41929743856 |
| 15 | 101579030280 |
| 16 | 231145969600 |
| 17 | 498267767424 |
| 18 | 1024487280288 |
| 19 | 2020455667392 |
| 20 | 3839788818840 |
| 21 | 7059475223640 |
| 22 | 12597342069312 |
| 23 | 21880343758504 |
| 24 | 37081456651008 |