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 | 24 |
| 2 | 276 |
| 3 | 2024 |
| 4 | 10602 |
| 5 | 41952 |
| 6 | 128500 |
| 7 | 303048 |
| 8 | 517155 |
| 9 | 463496 |
| 10 | -609684 |
| 11 | -3757992 |
| 12 | -9340852 |
| 13 | -14912280 |
| 14 | -12957624 |
| 15 | 8669712 |
| 16 | 59707149 |
| 17 | 132295080 |
| 18 | 183499244 |
| 19 | 131501856 |
| 20 | -113698752 |
| 21 | -575221744 |
| 22 | -1111921752 |
| 23 | -1363192680 |
| 24 | -824406065 |
| 25 | 889513752 |
| 26 | 3638565960 |
| 27 | 6404250248 |