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 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 6 |
| 11 | -1 |
| 12 | 5 |
| 13 | -3 |
| 14 | 10 |
| 15 | 0 |
| 16 | 9 |
| 17 | -7 |
| 18 | 16 |
| 19 | -9 |
| 20 | 17 |
| 21 | -6 |
| 22 | 22 |
| 23 | -13 |
| 24 | 20 |
| 25 | -15 |
| 26 | 28 |
| 27 | -14 |
| 28 | 35 |
| 29 | -23 |
| 30 | 36 |
| 31 | -25 |
| 32 | 36 |
| 33 | -24 |
| 34 | 42 |
| 35 | -26 |
| 36 | 53 |
| 37 | -37 |
| 38 | 50 |
| 39 | -34 |
| 40 | 58 |
| 41 | -45 |
| 42 | 60 |
| 43 | -49 |
| 44 | 75 |
| 45 | -37 |
| 46 | 66 |
| 47 | -55 |
| 48 | 77 |
| 49 | -59 |
| 50 | 74 |
| 51 | -60 |
| 52 | 101 |
| 53 | -71 |
| 54 | 88 |
| 55 | -64 |
| 56 | 106 |
| 57 | -74 |
| 58 | 92 |
| 59 | -83 |
| 60 | 124 |
| 61 | -89 |
| 62 | 98 |
| 63 | -79 |
| 64 | 130 |
| 65 | -90 |
| 66 | 120 |
| 67 | -105 |
| 68 | 155 |
| 69 | -104 |
| 70 | 120 |
| 71 | -113 |
| 72 | 163 |
| 73 | -121 |
| 74 | 126 |
| 75 | -111 |