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 | -2 |
| 4 | 1 |
| 5 | 1 |
| 6 | -3 |
| 7 | -2 |
| 8 | 4 |
| 9 | 1 |
| 10 | -4 |
| 11 | -13 |
| 12 | 8 |
| 13 | 8 |
| 14 | 1 |
| 15 | -5 |
| 16 | -44 |
| 17 | -3 |
| 18 | 38 |
| 19 | 13 |
| 20 | 1 |
| 21 | -6 |
| 22 | -123 |
| 23 | -117 |
| 24 | 125 |
| 25 | 101 |
| 26 | 19 |
| 27 | 1 |
| 28 | -7 |
| 29 | -314 |
| 30 | -718 |
| 31 | 205 |
| 32 | 594 |
| 33 | 213 |
| 34 | 26 |
| 35 | 1 |
| 36 | -8 |
| 37 | -761 |
| 38 | -3314 |
| 39 | -954 |
| 40 | 2787 |
| 41 | 1822 |
| 42 | 393 |
| 43 | 34 |
| 44 | 1 |
| 45 | -9 |
| 46 | -1784 |
| 47 | -13481 |
| 48 | -12644 |
| 49 | 9717 |
| 50 | 12987 |
| 51 | 4507 |
| 52 | 663 |
| 53 | 43 |
| 54 | 1 |
| 55 | -10 |
| 56 | -4087 |
| 57 | -51055 |
| 58 | -90625 |
| 59 | 12247 |
| 60 | 79419 |
| 61 | 43282 |
| 62 | 9727 |
| 63 | 1048 |