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 | -1 |
| 5 | 3 |
| 6 | -1 |
| 7 | 3 |
| 8 | 8 |
| 9 | -3 |
| 10 | -1 |
| 11 | 7 |
| 12 | 0 |
| 13 | 4 |
| 14 | 0 |
| 15 | 17 |
| 16 | -9 |
| 17 | 7 |
| 18 | 15 |
| 19 | 1 |
| 20 | -9 |
| 21 | 15 |
| 22 | -3 |
| 23 | 17 |
| 24 | -3 |
| 25 | 9 |
| 26 | -13 |
| 27 | 21 |
| 28 | -13 |
| 29 | 35 |
| 30 | -8 |
| 31 | 10 |
| 32 | 34 |
| 33 | -8 |
| 34 | 4 |
| 35 | 30 |
| 36 | -10 |
| 37 | 0 |
| 38 | 34 |
| 39 | -16 |
| 40 | 56 |
| 41 | -14 |
| 42 | 26 |
| 43 | -8 |
| 44 | -16 |
| 45 | 22 |
| 46 | -2 |
| 47 | 33 |
| 48 | -9 |
| 49 | 39 |
| 50 | 78 |
| 51 | -22 |
| 52 | 46 |
| 53 | 76 |
| 54 | -24 |
| 55 | 42 |
| 56 | 74 |
| 57 | -12 |
| 58 | 24 |
| 59 | 73 |
| 60 | -18 |
| 61 | 8 |
| 62 | -12 |
| 63 | 10 |
| 64 | -12 |
| 65 | 9 |
| 66 | -17 |
| 67 | 3 |
| 68 | -12 |
| 69 | 2 |
| 70 | 66 |
| 71 | -20 |
| 72 | 4 |
| 73 | 58 |
| 74 | -14 |
| 75 | 117 |
| 76 | -45 |
| 77 | 83 |
| 78 | -3 |
| 79 | 65 |