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 | -4 |
| 3 | 6 |
| 4 | -1 |
| 5 | -7 |
| 6 | 12 |
| 7 | -8 |
| 8 | -9 |
| 9 | 31 |
| 10 | -32 |
| 11 | -10 |
| 12 | 75 |
| 13 | -95 |
| 14 | 8 |
| 15 | 160 |
| 16 | -261 |
| 17 | 111 |
| 18 | 308 |
| 19 | -682 |
| 20 | 487 |
| 21 | 505 |
| 22 | -1676 |
| 23 | 1656 |
| 24 | 527 |
| 25 | -3857 |
| 26 | 4984 |
| 27 | -602 |
| 28 | -8237 |
| 29 | 13825 |
| 30 | -6192 |
| 31 | -15872 |
| 32 | 35891 |
| 33 | -26209 |
| 34 | -25556 |
| 35 | 87654 |
| 36 | -88305 |
| 37 | -24903 |
| 38 | 200860 |
| 39 | -264264 |
| 40 | 38503 |
| 41 | 426623 |
| 42 | -729392 |
| 43 | 341270 |
| 44 | 814747 |
| 45 | -1885407 |
| 46 | 1411928 |
| 47 | 1288224 |