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 | -2 |
| 2 | 3 |
| 3 | -2 |
| 4 | 0 |
| 5 | 3 |
| 6 | -5 |
| 7 | 5 |
| 8 | -2 |
| 9 | -3 |
| 10 | 8 |
| 11 | -10 |
| 12 | 7 |
| 13 | 1 |
| 14 | -11 |
| 15 | 18 |
| 16 | -17 |
| 17 | 6 |
| 18 | 12 |
| 19 | -29 |
| 20 | 35 |
| 21 | -23 |
| 22 | -6 |
| 23 | 41 |
| 24 | -64 |
| 25 | 58 |
| 26 | -17 |
| 27 | -47 |
| 28 | 105 |
| 29 | -122 |
| 30 | 75 |
| 31 | 30 |
| 32 | -152 |
| 33 | 227 |
| 34 | -197 |
| 35 | 45 |
| 36 | 182 |
| 37 | -379 |
| 38 | 424 |
| 39 | -242 |
| 40 | -137 |
| 41 | 561 |
| 42 | -803 |
| 43 | 666 |
| 44 | -105 |
| 45 | -698 |
| 46 | 1364 |
| 47 | -1469 |
| 48 | 771 |
| 49 | 593 |
| 50 | -2062 |
| 51 | 2833 |
| 52 | -2240 |
| 53 | 178 |
| 54 | 2655 |
| 55 | -4895 |
| 56 | 5073 |
| 57 | -2418 |
| 58 | -2477 |
| 59 | 7550 |
| 60 | -9968 |