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 | 1 |
| 2 | -4 |
| 3 | 73 |
| 4 | -3241 |
| 5 | 223546 |
| 6 | -10884061 |
| 7 | -5437091357 |
| 8 | 4560715140638 |
| 9 | -2741631069546683 |
| 10 | 1315509914960956853 |
| 11 | -135771066929217673256 |
| 12 | -969783690708328561039261 |
| 13 | 1943740128890758048004419957 |
| 14 | -2140191682145533094039398047820 |