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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | -17 |
| 4 | 967 |
| 5 | -4523 |
| 6 | 33735311 |
| 7 | -9301169 |
| 8 | 127021899032857 |
| 9 | -3546529522734769 |
| 10 | 5633317707758173 |
| 11 | -1935081812850766373 |
| 12 | 779950247074296817622891 |
| 13 | -1261508681536108282229 |
| 14 | 350992098387568751020053498509 |
| 15 | -17302487974885784968377519342317 |
| 16 | 26213945071317075538702463006927083 |