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 | 1 |
| 4 | 1 |
| 5 | -4 |
| 6 | 1 |
| 7 | 1 |
| 8 | 24 |
| 9 | 24 |
| 10 | 1 |
| 11 | 1 |
| 12 | -138 |
| 13 | -118 |
| 14 | -138 |
| 15 | 1 |
| 16 | 1 |
| 17 | 1110 |
| 18 | 780 |
| 19 | 780 |
| 20 | 1110 |
| 21 | 1 |
| 22 | 1 |
| 23 | -10120 |
| 24 | -8188 |
| 25 | -3358 |
| 26 | -8188 |
| 27 | -10120 |
| 28 | 1 |
| 29 | 1 |
| 30 | 100856 |
| 31 | 101976 |
| 32 | 30240 |
| 33 | 30240 |
| 34 | 101976 |
| 35 | 100856 |
| 36 | 1 |
| 37 | 1 |
| 38 | -1088710 |
| 39 | -1332574 |
| 40 | -512062 |
| 41 | -60478 |
| 42 | -512062 |
| 43 | -1332574 |
| 44 | -1088710 |
| 45 | 1 |