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 | 0 |
| 2 | -1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | -1 |
| 7 | -2 |
| 8 | 0 |
| 9 | 3 |
| 10 | 1 |
| 11 | -3 |
| 12 | -3 |
| 13 | 3 |
| 14 | 5 |
| 15 | -1 |
| 16 | -8 |
| 17 | -1 |
| 18 | 9 |
| 19 | 6 |
| 20 | -11 |
| 21 | -11 |
| 22 | 8 |
| 23 | 21 |
| 24 | -5 |
| 25 | -27 |
| 26 | -8 |
| 27 | 38 |
| 28 | 20 |
| 29 | -36 |
| 30 | -50 |
| 31 | 38 |
| 32 | 72 |
| 33 | -9 |
| 34 | -118 |
| 35 | -15 |
| 36 | 131 |
| 37 | 100 |
| 38 | -170 |
| 39 | -166 |
| 40 | 118 |
| 41 | 330 |
| 42 | -94 |
| 43 | -411 |
| 44 | -129 |
| 45 | 618 |
| 46 | 294 |
| 47 | -567 |
| 48 | -817 |
| 49 | 663 |
| 50 | 1124 |
| 51 | -139 |
| 52 | -1963 |
| 53 | -162 |
| 54 | 2087 |
| 55 | 1691 |
| 56 | -2902 |
| 57 | -2605 |
| 58 | 1851 |
| 59 | 5562 |
| 60 | -1758 |