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 | -1 |
| 2 | 1 |
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | -2 |
| 7 | 3 |
| 8 | -3 |
| 9 | 1 |
| 10 | 5 |
| 11 | -8 |
| 12 | 6 |
| 13 | -4 |
| 14 | 1 |
| 15 | -16 |
| 16 | 25 |
| 17 | -20 |
| 18 | 10 |
| 19 | -5 |
| 20 | 1 |
| 21 | 61 |
| 22 | -96 |
| 23 | 75 |
| 24 | -40 |
| 25 | 15 |
| 26 | -6 |
| 27 | 1 |
| 28 | -272 |
| 29 | 427 |
| 30 | -336 |
| 31 | 175 |
| 32 | -70 |
| 33 | 21 |
| 34 | -7 |
| 35 | 1 |
| 36 | 1385 |
| 37 | -2176 |
| 38 | 1708 |
| 39 | -896 |
| 40 | 350 |
| 41 | -112 |
| 42 | 28 |
| 43 | -8 |
| 44 | 1 |
| 45 | -7936 |
| 46 | 12465 |
| 47 | -9792 |
| 48 | 5124 |
| 49 | -2016 |
| 50 | 630 |
| 51 | -168 |
| 52 | 36 |
| 53 | -9 |
| 54 | 1 |
| 55 | 50521 |