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 | 3 |
| 1 | -1 |
| 2 | -1 |
| 3 | 8 |
| 4 | -9 |
| 5 | -1 |
| 6 | 26 |
| 7 | -43 |
| 8 | 15 |
| 9 | 80 |
| 10 | -181 |
| 11 | 131 |
| 12 | 210 |
| 13 | -703 |
| 14 | 755 |
| 15 | 368 |
| 16 | -2529 |
| 17 | 3671 |
| 18 | -406 |
| 19 | -8323 |
| 20 | 16071 |
| 21 | -8560 |
| 22 | -24157 |
| 23 | 64859 |
| 24 | -57822 |
| 25 | -55351 |
| 26 | 242891 |
| 27 | -303184 |
| 28 | -50409 |
| 29 | 839375 |
| 30 | -1395334 |
| 31 | 455141 |
| 32 | 2618943 |
| 33 | -5864752 |
| 34 | 4156091 |
| 35 | 6946547 |
| 36 | -22832142 |
| 37 | 24197777 |