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 | 32 |
| 2 | 302 |
| 3 | -36544 |
| 4 | -1823540 |
| 5 | 47185792 |
| 6 | 8092924744 |
| 7 | 54564740864 |
| 8 | -39155569948528 |
| 9 | -1568144181583360 |
| 10 | 204252279714867424 |
| 11 | 17858073941907616768 |
| 12 | -1050713239354433344832 |
| 13 | -188345176292029458712576 |
| 14 | 3834948823235768695790720 |
| 15 | 2026511404303378366932021248 |