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) |
|---|---|
| 1 | 0 |
| 2 | -4 |
| 3 | 8 |
| 4 | 36 |
| 5 | -144 |
| 6 | 236 |
| 7 | -328 |
| 8 | 580 |
| 9 | -1088 |
| 10 | 1836 |
| 11 | -3096 |
| 12 | 5668 |
| 13 | -10736 |
| 14 | 20668 |
| 15 | -40328 |