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 | 12 |
| 2 | -1538 |
| 3 | -58824 |
| 4 | 7054860 |
| 5 | 480426192 |
| 6 | -53566258296 |
| 7 | -5491256229216 |
| 8 | 564794050426512 |
| 9 | 80667872425448640 |
| 10 | -7581837866251154976 |
| 11 | -1447815668591059984512 |
| 12 | 122905376178286149551808 |
| 13 | 30697575968981388522011904 |
| 14 | -2319078043886628283835690880 |