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 | 1 |
| 2 | -8 |
| 3 | 145 |
| 4 | -3266 |
| 5 | 82342 |
| 6 | -2223818 |
| 7 | 62912809 |
| 8 | -1840413050 |
| 9 | 55217088622 |
| 10 | -1689752866904 |
| 11 | 52538652432586 |
| 12 | -1655036407913948 |
| 13 | 52708355827445800 |
| 14 | -1694246075896308110 |
| 15 | 54894923324331676345 |
| 16 | -1790984858946499478330 |