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 | -1778 |
| 3 | -67464 |
| 4 | 9442380 |
| 5 | 631971792 |
| 6 | -83157610296 |
| 7 | -8285790028896 |
| 8 | 1019373008575632 |
| 9 | 139634783587212480 |
| 10 | -15957496899294732576 |
| 11 | -2875270503337760656512 |
| 12 | 302870153404836108243648 |
| 13 | 69949680729840145080716544 |
| 14 | -6728117484215153259607190400 |