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 | 2 |
| 3 | -2 |
| 4 | -14 |
| 5 | -32 |
| 6 | -30 |
| 7 | 64 |
| 8 | 346 |
| 9 | 752 |
| 10 | 584 |
| 11 | -2044 |
| 12 | -9486 |
| 13 | -19324 |
| 14 | -11368 |
| 15 | 66180 |
| 16 | 271658 |
| 17 | 514916 |
| 18 | 192584 |
| 19 | -2151612 |
| 20 | -7949736 |
| 21 | -13933280 |
| 22 | -1779028 |
| 23 | 69933368 |
| 24 | 235295106 |
| 25 | 378579404 |
| 26 | -61171228 |
| 27 | -2267724644 |
| 28 | -7003832456 |
| 29 | -10248117752 |
| 30 | 5236354188 |
| 31 | 73288104568 |