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 | -6 |
| 2 | -90 |
| 3 | -1980 |
| 4 | -50490 |
| 5 | -1393524 |
| 6 | -40412196 |
| 7 | -1212365880 |
| 8 | -37280250810 |
| 9 | -1168114525380 |
| 10 | -37146041907084 |
| 11 | -1195427166827976 |
| 12 | -38851382921909220 |
| 13 | -1273129932671794440 |
| 14 | -42013287778169216520 |