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 | 7 |
| 2 | 14 |
| 3 | -7 |
| 4 | -42 |
| 5 | 28 |
| 6 | 133 |
| 7 | -90 |
| 8 | -357 |
| 9 | 231 |
| 10 | 833 |
| 11 | -511 |
| 12 | -1792 |
| 13 | 1064 |
| 14 | 3695 |
| 15 | -2163 |
| 16 | -7329 |
| 17 | 4221 |
| 18 | 13923 |
| 19 | -7847 |
| 20 | -25536 |
| 21 | 14161 |
| 22 | 45703 |
| 23 | -25109 |
| 24 | -80010 |
| 25 | 43526 |
| 26 | 136941 |
| 27 | -73654 |
| 28 | -229823 |
| 29 | 122493 |
| 30 | 379582 |
| 31 | -200935 |
| 32 | -617729 |
| 33 | 324751 |