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 | -2 |
| 3 | -11 |
| 4 | -11 |
| 5 | -92 |
| 6 | 151 |
| 7 | -578 |
| 8 | -578 |
| 9 | -578 |
| 10 | 19105 |
| 11 | -39944 |
| 12 | -39944 |
| 13 | -571385 |
| 14 | 1022938 |
| 15 | 5805907 |
| 16 | 5805907 |
| 17 | -37240814 |
| 18 | -37240814 |
| 19 | -424661303 |
| 20 | -424661303 |
| 21 | 3062123098 |
| 22 | 13522476301 |
| 23 | -17858583308 |
| 24 | -17858583308 |
| 25 | -17858583308 |
| 26 | 829430026135 |
| 27 | 829430026135 |
| 28 | 829430026135 |