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 | 56 |
| 2 | 1214 |
| 3 | -147280 |
| 4 | -15247604 |
| 5 | 278422816 |
| 6 | 162121152136 |
| 7 | 5868012605504 |
| 8 | -1852569274929520 |
| 9 | -193970441218282624 |
| 10 | 21183398609507010016 |
| 11 | 4914382202347784594176 |
| 12 | -172654010070721268484416 |
| 13 | -123013935678909694915202560 |
| 14 | -2574847302391901300899725184 |