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 | -14 |
| 2 | 77 |
| 3 | -210 |
| 4 | 392 |
| 5 | -1288 |
| 6 | 4697 |
| 7 | -9998 |
| 8 | 18179 |
| 9 | -55636 |
| 10 | 150591 |
| 11 | -286832 |
| 12 | 608909 |
| 13 | -1554042 |
| 14 | 3444055 |
| 15 | -6999356 |
| 16 | 14790755 |
| 17 | -32329780 |
| 18 | 70059535 |
| 19 | -141733788 |
| 20 | 282586556 |
| 21 | -600593730 |
| 22 | 1244075259 |
| 23 | -2429815472 |
| 24 | 4846233028 |