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 | -2 |
| 3 | -10 |
| 4 | -74 |
| 5 | -706 |
| 6 | -8162 |
| 7 | -110410 |
| 8 | -1708394 |
| 9 | -29752066 |
| 10 | -576037442 |
| 11 | -12277827850 |
| 12 | -285764591114 |
| 13 | -7213364729026 |
| 14 | -196316804255522 |
| 15 | -5731249477826890 |
| 16 | -178676789473121834 |
| 17 | -5925085744543837186 |