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 | 0 |
| 1 | -1 |
| 2 | 8 |
| 3 | -23 |
| 4 | 51 |
| 5 | -94 |
| 6 | 157 |
| 7 | -242 |
| 8 | 354 |
| 9 | -495 |
| 10 | 670 |
| 11 | -881 |
| 12 | 1133 |
| 13 | -1428 |
| 14 | 1771 |
| 15 | -2164 |
| 16 | 2612 |
| 17 | -3117 |
| 18 | 3684 |
| 19 | -4315 |
| 20 | 5015 |
| 21 | -5786 |
| 22 | 6633 |
| 23 | -7558 |
| 24 | 8566 |
| 25 | -9659 |
| 26 | 10842 |
| 27 | -12117 |
| 28 | 13489 |
| 29 | -14960 |
| 30 | 16535 |
| 31 | -18216 |
| 32 | 20008 |
| 33 | -21913 |
| 34 | 23936 |
| 35 | -26079 |
| 36 | 28347 |
| 37 | -30742 |
| 38 | 33269 |