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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -22 |
| 5 | 1 |
| 6 | 1 |
| 7 | -75 |
| 8 | -75 |
| 9 | 1 |
| 10 | 1 |
| 11 | -236 |
| 12 | 1446 |
| 13 | -236 |
| 14 | 1 |
| 15 | 1 |
| 16 | -721 |
| 17 | 9822 |
| 18 | 9822 |
| 19 | -721 |
| 20 | 1 |
| 21 | 1 |
| 22 | -2178 |
| 23 | 58479 |
| 24 | -201244 |
| 25 | 58479 |
| 26 | -2178 |
| 27 | 1 |
| 28 | 1 |
| 29 | -6551 |
| 30 | 325061 |
| 31 | -2160227 |
| 32 | -2160227 |
| 33 | 325061 |
| 34 | -6551 |
| 35 | 1 |
| 36 | 1 |
| 37 | -19672 |
| 38 | 1736668 |
| 39 | -19971304 |
| 40 | 49441990 |
| 41 | -19971304 |
| 42 | 1736668 |
| 43 | -19672 |
| 44 | 1 |