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 | 0 |
| 2 | 0 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 0 |
| 12 | -1 |
| 13 | 1 |
| 14 | 0 |
| 15 | 0 |
| 16 | -1 |
| 17 | 2 |
| 18 | 3 |
| 19 | -3 |
| 20 | -1 |
| 21 | 0 |
| 22 | 1 |
| 23 | -1 |
| 24 | -2 |
| 25 | -5 |
| 26 | 13 |
| 27 | -7 |
| 28 | -7 |
| 29 | -6 |
| 30 | 1 |
| 31 | 8 |
| 32 | -1 |
| 33 | -17 |
| 34 | 25 |
| 35 | 13 |
| 36 | -12 |
| 37 | 11 |
| 38 | 12 |
| 39 | -11 |
| 40 | -12 |
| 41 | -4 |
| 42 | 1 |
| 43 | 1 |
| 44 | -66 |
| 45 | -60 |
| 46 | -26 |
| 47 | -13 |
| 48 | 40 |
| 49 | -67 |
| 50 | -1 |
| 51 | 82 |
| 52 | 81 |
| 53 | -49 |
| 54 | -32 |
| 55 | 68 |
| 56 | 103 |
| 57 | -222 |
| 58 | 503 |
| 59 | -39 |
| 60 | -134 |