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 | 1 |
| 5 | -1 |
| 6 | 1 |
| 7 | -1 |
| 8 | 0 |
| 9 | 1 |
| 10 | -2 |
| 11 | 3 |
| 12 | -4 |
| 13 | 5 |
| 14 | -6 |
| 15 | 7 |
| 16 | -7 |
| 17 | 6 |
| 18 | -4 |
| 19 | 1 |
| 20 | 3 |
| 21 | -9 |
| 22 | 16 |
| 23 | -24 |
| 24 | 32 |
| 25 | -39 |
| 26 | 44 |
| 27 | -46 |
| 28 | 44 |
| 29 | -35 |
| 30 | 18 |
| 31 | 8 |
| 32 | -43 |
| 33 | 86 |
| 34 | -135 |
| 35 | 187 |
| 36 | -238 |
| 37 | 280 |
| 38 | -304 |
| 39 | 300 |
| 40 | -259 |
| 41 | 171 |
| 42 | -28 |
| 43 | -174 |
| 44 | 435 |
| 45 | -746 |
| 46 | 1088 |
| 47 | -1431 |
| 48 | 1736 |
| 49 | -1952 |
| 50 | 2017 |
| 51 | -1864 |
| 52 | 1425 |
| 53 | -641 |
| 54 | -527 |
| 55 | 2086 |
| 56 | -4002 |