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 | -4 |
| 2 | -17 |
| 3 | 179 |
| 4 | 5797 |
| 5 | -116281 |
| 6 | -5639597 |
| 7 | 160147259 |
| 8 | 10354914217 |
| 9 | -378481636081 |
| 10 | -30589811809577 |
| 11 | 1366711928649539 |
| 12 | 132553038532458637 |
| 13 | -6999164619961648681 |
| 14 | -791964366849929194757 |
| 15 | 48251486433625010467019 |
| 16 | 6239676452086073968783057 |