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 | -1 |
| 2 | -8 |
| 3 | -19 |
| 4 | -9 |
| 5 | 127 |
| 6 | 500 |
| 7 | 1038 |
| 8 | 448 |
| 9 | -4967 |
| 10 | -21463 |
| 11 | -50043 |
| 12 | -59084 |
| 13 | 70418 |
| 14 | 600080 |
| 15 | 1837349 |
| 16 | 3532062 |
| 17 | 3179251 |
| 18 | -6965009 |
| 19 | -42260393 |
| 20 | -119597290 |
| 21 | -224546234 |
| 22 | -223670132 |
| 23 | 292245783 |
| 24 | 2156083245 |
| 25 | 6428174973 |
| 26 | 13030612271 |
| 27 | 16820582355 |
| 28 | -133402359 |
| 29 | -78307103593 |