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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | -26 |
| 4 | 1 |
| 5 | 126 |
| 6 | -26 |
| 7 | -342 |
| 8 | 1 |
| 9 | 703 |
| 10 | 126 |
| 11 | -1330 |
| 12 | -26 |
| 13 | 2198 |
| 14 | -342 |
| 15 | -3276 |
| 16 | 1 |
| 17 | 4914 |
| 18 | 703 |
| 19 | -6858 |
| 20 | 126 |
| 21 | 8892 |
| 22 | -1330 |
| 23 | -12166 |
| 24 | -26 |
| 25 | 15751 |
| 26 | 2198 |
| 27 | -18980 |
| 28 | -342 |
| 29 | 24390 |
| 30 | -3276 |
| 31 | -29790 |
| 32 | 1 |
| 33 | 34580 |
| 34 | 4914 |
| 35 | -43092 |
| 36 | 703 |
| 37 | 50654 |
| 38 | -6858 |
| 39 | -57148 |
| 40 | 126 |
| 41 | 68922 |
| 42 | 8892 |
| 43 | -79506 |
| 44 | -1330 |