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 | -98388 |
| 3 | -20312544 |
| 4 | -5889254484 |
| 5 | -2083830070392 |
| 6 | -810894400450848 |
| 7 | -334381509272710464 |
| 8 | -143464412162723380308 |
| 9 | -63364234685240118242604 |
| 10 | -28614423885137875351570248 |
| 11 | -13150804531745894256074689056 |