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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 0 |
| 9 | -8 |
| 10 | -44 |
| 11 | -164 |
| 12 | -494 |
| 13 | -1286 |
| 14 | -3002 |
| 15 | -6434 |
| 16 | -12868 |
| 17 | -24292 |
| 18 | -43604 |
| 19 | -74612 |
| 20 | -121124 |
| 21 | -183140 |
| 22 | -245156 |
| 23 | -245156 |
| 24 | 0 |
| 25 | 961376 |
| 26 | 3749136 |
| 27 | 10814896 |
| 28 | 27293176 |
| 29 | 63453016 |
| 30 | 138975976 |
| 31 | 290021896 |
| 32 | 580043792 |
| 33 | 1114351888 |
| 34 | 2054677648 |
| 35 | 3619173776 |