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 | 36 |
| 2 | 574 |
| 3 | -31320 |
| 4 | -2370804 |
| 5 | 5103216 |
| 6 | 8742318216 |
| 7 | 292616324064 |
| 8 | -33649488597360 |
| 9 | -2901533477298624 |
| 10 | 114199171722894816 |
| 11 | 25060241888120278656 |
| 12 | -4801113850900597056 |
| 13 | -217294775817306515769600 |
| 14 | -7777548674818481563737984 |
| 15 | 1916423841667868925104549376 |