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 | 2 |
| 3 | 1 |
| 4 | -2 |
| 5 | 3 |
| 6 | -1 |
| 7 | -3 |
| 8 | 5 |
| 9 | -4 |
| 10 | -2 |
| 11 | 8 |
| 12 | -9 |
| 13 | 2 |
| 14 | 10 |
| 15 | -17 |
| 16 | 11 |
| 17 | 8 |
| 18 | -27 |
| 19 | 28 |
| 20 | -3 |
| 21 | -35 |
| 22 | 55 |
| 23 | -31 |
| 24 | -32 |
| 25 | 90 |
| 26 | -86 |
| 27 | -1 |
| 28 | 122 |
| 29 | -176 |
| 30 | 85 |
| 31 | 123 |
| 32 | -298 |
| 33 | 261 |
| 34 | 38 |
| 35 | -421 |
| 36 | 559 |
| 37 | -223 |
| 38 | -459 |
| 39 | 980 |
| 40 | -782 |
| 41 | -236 |
| 42 | 1439 |
| 43 | -1762 |
| 44 | 546 |
| 45 | 1675 |
| 46 | -3201 |
| 47 | 2308 |
| 48 | 1129 |
| 49 | -4876 |
| 50 | 5509 |
| 51 | -1179 |
| 52 | -6005 |
| 53 | 10385 |
| 54 | -6688 |
| 55 | -4826 |
| 56 | 16390 |
| 57 | -17073 |
| 58 | 1862 |
| 59 | 21216 |