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 | 0 |
| 3 | 3 |
| 4 | -1 |
| 5 | 2 |
| 6 | 3 |
| 7 | 6 |
| 8 | -12 |
| 9 | 3 |
| 10 | 20 |
| 11 | 23 |
| 12 | -49 |
| 13 | -46 |
| 14 | 41 |
| 15 | 182 |
| 16 | -100 |
| 17 | -97 |
| 18 | -6 |
| 19 | -3 |
| 20 | -613 |
| 21 | 418 |
| 22 | 1941 |
| 23 | 1944 |
| 24 | -5518 |
| 25 | -4765 |
| 26 | 1364 |
| 27 | 10205 |
| 28 | 2629 |
| 29 | 2632 |
| 30 | -1181 |
| 31 | -1178 |
| 32 | -71404 |
| 33 | 7463 |
| 34 | 105748 |
| 35 | 127245 |
| 36 | -233385 |
| 37 | -233382 |
| 38 | 159813 |
| 39 | 868586 |
| 40 | -335790 |
| 41 | -335787 |
| 42 | -853276 |
| 43 | -853273 |
| 44 | -2689757 |
| 45 | 4163818 |