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) |
|---|---|
| 3 | 0 |
| 4 | -1 |
| 5 | 0 |
| 6 | -1 |
| 7 | 2 |
| 8 | -3 |
| 9 | 4 |
| 10 | -1 |
| 11 | 2 |
| 12 | -3 |
| 13 | 8 |
| 14 | -5 |
| 15 | 10 |
| 16 | -3 |
| 17 | 0 |
| 18 | -1 |
| 19 | 14 |
| 20 | -7 |
| 21 | 16 |
| 22 | -5 |
| 23 | 2 |
| 24 | -3 |
| 25 | 20 |
| 26 | -9 |
| 27 | 14 |
| 28 | -3 |
| 29 | 8 |
| 30 | -5 |
| 31 | 26 |
| 32 | -15 |
| 33 | 28 |
| 34 | -1 |
| 35 | 6 |
| 36 | -3 |
| 37 | 12 |
| 38 | -13 |
| 39 | 34 |
| 40 | -3 |
| 41 | 8 |
| 42 | -9 |
| 43 | 38 |
| 44 | -19 |
| 45 | 40 |
| 46 | -5 |
| 47 | 2 |
| 48 | -3 |
| 49 | 44 |
| 50 | -17 |
| 51 | 34 |
| 52 | -11 |
| 53 | 12 |
| 54 | -5 |
| 55 | 50 |
| 56 | -19 |
| 57 | 24 |
| 58 | -9 |
| 59 | 14 |
| 60 | -3 |
| 61 | 56 |
| 62 | -29 |
| 63 | 58 |
| 64 | -3 |
| 65 | 8 |
| 66 | -1 |
| 67 | 30 |
| 68 | -27 |
| 69 | 64 |
| 70 | -5 |
| 71 | 18 |
| 72 | -23 |
| 73 | 68 |
| 74 | -25 |
| 75 | 70 |
| 76 | -3 |
| 77 | 4 |
| 78 | -5 |
| 79 | 42 |
| 80 | -31 |
| 81 | 76 |
| 82 | -17 |
| 83 | 26 |
| 84 | -3 |
| 85 | 80 |