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) |
|---|---|
| 1 | 1 |
| 2 | -1 |
| 3 | 1 |
| 4 | -2 |
| 5 | 1 |
| 6 | 1 |
| 7 | -3 |
| 8 | 3 |
| 9 | -1 |
| 10 | 1 |
| 11 | -4 |
| 12 | 6 |
| 13 | -4 |
| 14 | 1 |
| 15 | 1 |
| 16 | -6 |
| 17 | 13 |
| 18 | -13 |
| 19 | 6 |
| 20 | -1 |
| 21 | 1 |
| 22 | -8 |
| 23 | 24 |
| 24 | -34 |
| 25 | 24 |
| 26 | -8 |
| 27 | 1 |
| 28 | 1 |
| 29 | -10 |
| 30 | 39 |
| 31 | -75 |
| 32 | 75 |
| 33 | -39 |
| 34 | 10 |
| 35 | -1 |
| 36 | 1 |
| 37 | -12 |
| 38 | 58 |
| 39 | -144 |
| 40 | 195 |
| 41 | -144 |
| 42 | 58 |
| 43 | -12 |
| 44 | 1 |
| 45 | 1 |
| 46 | -14 |
| 47 | 81 |
| 48 | -250 |
| 49 | 444 |
| 50 | -459 |
| 51 | 271 |
| 52 | -89 |
| 53 | 15 |
| 54 | -1 |
| 55 | 1 |
| 56 | -16 |
| 57 | 108 |
| 58 | -400 |
| 59 | 886 |