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 | 1 |
| 3 | -2 |
| 4 | 1 |
| 5 | -8 |
| 6 | 1 |
| 7 | 24 |
| 8 | -20 |
| 9 | 1 |
| 10 | 184 |
| 11 | -40 |
| 12 | 1 |
| 13 | -720 |
| 14 | 784 |
| 15 | -70 |
| 16 | 1 |
| 17 | -8448 |
| 18 | 2464 |
| 19 | -112 |
| 20 | 1 |
| 21 | 40320 |
| 22 | -52352 |
| 23 | 6384 |
| 24 | -168 |
| 25 | 1 |
| 26 | 648576 |
| 27 | -229760 |
| 28 | 14448 |
| 29 | -240 |
| 30 | 1 |
| 31 | -3628800 |
| 32 | 5360256 |
| 33 | -804320 |
| 34 | 29568 |
| 35 | -330 |
| 36 | 1 |