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 | 8 |
| 2 | -19 |
| 3 | 106 |
| 4 | -237 |
| 5 | 1094 |
| 6 | -1103 |
| 7 | 3810 |
| 8 | -3049 |
| 9 | 9118 |
| 10 | -15271 |
| 11 | 14520 |
| 12 | -36133 |
| 13 | 32788 |
| 14 | -46719 |
| 15 | 57104 |
| 16 | -91773 |
| 17 | 113606 |
| 18 | -113375 |
| 19 | 187388 |
| 20 | -170523 |
| 21 | 218494 |
| 22 | -274545 |
| 23 | 297242 |
| 24 | -407727 |
| 25 | 504946 |