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 | 11 |
| 2 | 23 |
| 3 | -1903 |
| 4 | -27695 |
| 5 | 441331 |
| 6 | 18425191 |
| 7 | -56825527 |
| 8 | -13264761823 |
| 9 | -101361166885 |
| 10 | 10584547092151 |
| 11 | 215763961560961 |
| 12 | -9036738188168207 |
| 13 | -353142538865540413 |
| 14 | 7628236524205351175 |
| 15 | 568422165089780309561 |
| 16 | -4960863874594282822079 |