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 | 7 |
| 4 | -5 |
| 5 | 1 |
| 6 | -41 |
| 7 | 32 |
| 8 | -9 |
| 9 | 1 |
| 10 | 376 |
| 11 | -299 |
| 12 | 91 |
| 13 | -14 |
| 14 | 1 |
| 15 | -5033 |
| 16 | 4015 |
| 17 | -1241 |
| 18 | 205 |
| 19 | -20 |
| 20 | 1 |
| 21 | 92821 |
| 22 | -74080 |
| 23 | 22954 |
| 24 | -3842 |
| 25 | 400 |
| 26 | -27 |
| 27 | 1 |
| 28 | -2257166 |
| 29 | 1801537 |
| 30 | -558402 |
| 31 | 93652 |
| 32 | -9863 |
| 33 | 707 |
| 34 | -35 |
| 35 | 1 |
| 36 | 69981919 |
| 37 | -55855829 |
| 38 | 17313721 |
| 39 | -2904530 |
| 40 | 306409 |
| 41 | -22190 |
| 42 | 1162 |
| 43 | -44 |
| 44 | 1 |
| 45 | -2694447797 |
| 46 | 2150565968 |