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 | 0 |
| 2 | -2 |
| 3 | 4 |
| 4 | -1 |
| 5 | -8 |
| 6 | 14 |
| 7 | -4 |
| 8 | -23 |
| 9 | 40 |
| 10 | -10 |
| 11 | -60 |
| 12 | 98 |
| 13 | -24 |
| 14 | -140 |
| 15 | 224 |
| 16 | -54 |
| 17 | -304 |
| 18 | 478 |
| 19 | -112 |
| 20 | -627 |
| 21 | 968 |
| 22 | -224 |
| 23 | -1236 |
| 24 | 1884 |
| 25 | -432 |
| 26 | -2346 |
| 27 | 3540 |
| 28 | -801 |
| 29 | -4320 |
| 30 | 6454 |
| 31 | -1448 |
| 32 | -7742 |
| 33 | 11472 |
| 34 | -2556 |
| 35 | -13548 |
| 36 | 19936 |
| 37 | -4408 |
| 38 | -23226 |
| 39 | 33952 |
| 40 | -7462 |
| 41 | -39080 |
| 42 | 56800 |
| 43 | -12416 |
| 44 | -64660 |