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 | -10 |
| 2 | 1 |
| 3 | 110 |
| 4 | -21 |
| 5 | 1 |
| 6 | -1320 |
| 7 | 362 |
| 8 | -33 |
| 9 | 1 |
| 10 | 17160 |
| 11 | -6026 |
| 12 | 791 |
| 13 | -46 |
| 14 | 1 |
| 15 | -240240 |
| 16 | 101524 |
| 17 | -17100 |
| 18 | 1435 |
| 19 | -60 |
| 20 | 1 |
| 21 | 3603600 |
| 22 | -1763100 |
| 23 | 358024 |
| 24 | -38625 |
| 25 | 2335 |
| 26 | -75 |
| 27 | 1 |
| 28 | -57657600 |
| 29 | 31813200 |
| 30 | -7491484 |
| 31 | 976024 |
| 32 | -75985 |
| 33 | 3535 |
| 34 | -91 |
| 35 | 1 |
| 36 | 980179200 |
| 37 | -598482000 |
| 38 | 159168428 |
| 39 | -24083892 |
| 40 | 2267769 |
| 41 | -136080 |
| 42 | 5082 |
| 43 | -108 |
| 44 | 1 |