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 | 0 |
| 4 | -3 |
| 5 | -8 |
| 6 | -14 |
| 7 | -15 |
| 8 | 1 |
| 9 | 51 |
| 10 | 146 |
| 11 | 261 |
| 12 | 286 |
| 13 | -24 |
| 14 | -1029 |
| 15 | -2975 |
| 16 | -5375 |
| 17 | -5930 |
| 18 | 591 |
| 19 | 22014 |
| 20 | 63886 |
| 21 | 115947 |
| 22 | 128183 |
| 23 | -14595 |
| 24 | -486466 |
| 25 | -1413161 |
| 26 | -2569868 |
| 27 | -2840890 |
| 28 | 361667 |
| 29 | 10972167 |
| 30 | 31861581 |
| 31 | 57980426 |
| 32 | 64018181 |
| 33 | -8985428 |
| 34 | -250991300 |
| 35 | -727998021 |
| 36 | -1324662165 |