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 | -2 |
| 2 | -8 |
| 3 | -2 |
| 4 | 30 |
| 5 | 110 |
| 6 | 92 |
| 7 | -182 |
| 8 | -976 |
| 9 | -2064 |
| 10 | -1488 |
| 11 | 3714 |
| 12 | 17618 |
| 13 | 35814 |
| 14 | 37680 |
| 15 | -25278 |
| 16 | -216910 |
| 17 | -541538 |
| 18 | -819268 |
| 19 | -480334 |
| 20 | 1441634 |
| 21 | 5924858 |
| 22 | 12518720 |
| 23 | 16883366 |
| 24 | 7972200 |
| 25 | -32275008 |
| 26 | -120780700 |
| 27 | -250726492 |
| 28 | -349220282 |
| 29 | -229745138 |
| 30 | 424373412 |
| 31 | 1958370998 |
| 32 | 4418456156 |