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 | -24 |
| 4 | 0 |
| 5 | 276 |
| 6 | 300 |
| 7 | -1748 |
| 8 | -4300 |
| 9 | 4278 |
| 10 | 29026 |
| 11 | 22724 |
| 12 | -94668 |
| 13 | -242398 |
| 14 | -18722 |
| 15 | 856980 |
| 16 | 1472252 |
| 17 | -384491 |
| 18 | -5299269 |
| 19 | -7824968 |
| 20 | 2088032 |
| 21 | 25655442 |
| 22 | 38814478 |
| 23 | -69160 |
| 24 | -99735912 |
| 25 | -175711283 |
| 26 | -68736397 |
| 27 | 294769680 |
| 28 | 686373176 |
| 29 | 562588924 |
| 30 | -513324396 |
| 31 | -2155273788 |
| 32 | -2808874356 |