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 | 38 |
| 2 | 562 |
| 3 | -45676 |
| 4 | -3222740 |
| 5 | 38680808 |
| 6 | 15682154104 |
| 7 | 391223020016 |
| 8 | -81955144677488 |
| 9 | -5874765126977440 |
| 10 | 427318863624757024 |
| 11 | 68053545237681787712 |
| 12 | -1559812895855484713792 |
| 13 | -779551612838132460267904 |
| 14 | -11738146623970045761841280 |
| 15 | 9179853743614397880438109952 |