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 | -12 |
| 3 | 66 |
| 4 | -220 |
| 5 | 483 |
| 6 | -660 |
| 7 | 252 |
| 8 | 1320 |
| 9 | -4059 |
| 10 | 6644 |
| 11 | -6336 |
| 12 | 240 |
| 13 | 12255 |
| 14 | -27192 |
| 15 | 35850 |
| 16 | -27972 |
| 17 | -2343 |
| 18 | 50568 |
| 19 | -99286 |
| 20 | 122496 |
| 21 | -96162 |
| 22 | 11584 |
| 23 | 115116 |
| 24 | -242616 |
| 25 | 315216 |
| 26 | -283800 |
| 27 | 128304 |
| 28 | 126280 |
| 29 | -409398 |
| 30 | 622644 |
| 31 | -671550 |
| 32 | 501468 |
| 33 | -122508 |
| 34 | -382360 |