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 | 2 |
| 2 | -1 |
| 3 | 4 |
| 4 | -4 |
| 5 | 8 |
| 6 | 1 |
| 7 | -12 |
| 8 | 16 |
| 9 | 6 |
| 10 | -32 |
| 11 | 32 |
| 12 | -1 |
| 13 | 24 |
| 14 | -80 |
| 15 | 64 |
| 16 | -8 |
| 17 | 80 |
| 18 | -192 |
| 19 | 128 |
| 20 | 1 |
| 21 | -40 |
| 22 | 240 |
| 23 | -448 |
| 24 | 256 |
| 25 | 10 |
| 26 | -160 |
| 27 | 672 |
| 28 | -1024 |
| 29 | 512 |
| 30 | -1 |
| 31 | 60 |
| 32 | -560 |
| 33 | 1792 |
| 34 | -2304 |
| 35 | 1024 |
| 36 | -12 |
| 37 | 280 |
| 38 | -1792 |
| 39 | 4608 |
| 40 | -5120 |
| 41 | 2048 |