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 | -8 |
| 2 | -16 |
| 3 | -128 |
| 4 | -1312 |
| 5 | -15104 |
| 6 | -186112 |
| 7 | -2398208 |
| 8 | -31898176 |
| 9 | -434421248 |
| 10 | -6025687552 |
| 11 | -84808699904 |
| 12 | -1207939190272 |
| 13 | -17375932633088 |
| 14 | -252046328713216 |
| 15 | -3682284573851648 |
| 16 | -54130292542567552 |
| 17 | -800036763837307904 |
| 18 | -11880834659028677632 |
| 19 | -177181827571092267008 |