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 | 16 |
| 2 | -82 |
| 3 | -12128 |
| 4 | -110900 |
| 5 | 14622656 |
| 6 | 421383496 |
| 7 | -22912610432 |
| 8 | -1363595118448 |
| 9 | 40138176712960 |
| 10 | 4790267177726176 |
| 11 | -59022762446185984 |
| 12 | -18754577565924898112 |
| 13 | -60676916573068018688 |
| 14 | 81436783159504914005120 |
| 15 | 1590111699775836488513536 |
| 16 | -387442703422276530189741824 |