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 | -1 |
| 5 | 0 |
| 6 | -1 |
| 7 | -1 |
| 8 | -1 |
| 9 | -1 |
| 10 | -1 |
| 11 | -1 |
| 12 | 0 |
| 13 | 1 |
| 14 | 2 |
| 15 | 2 |
| 16 | 1 |
| 17 | -1 |
| 18 | -3 |
| 19 | -6 |
| 20 | -10 |
| 21 | -14 |
| 22 | -17 |
| 23 | -17 |
| 24 | -14 |
| 25 | -9 |
| 26 | -4 |
| 27 | -1 |
| 28 | -1 |
| 29 | -3 |
| 30 | -5 |
| 31 | -6 |
| 32 | -5 |
| 33 | -2 |
| 34 | 3 |
| 35 | 9 |
| 36 | 14 |
| 37 | 16 |
| 38 | 14 |
| 39 | 9 |
| 40 | 4 |
| 41 | 1 |
| 42 | 0 |
| 43 | 0 |
| 44 | -1 |
| 45 | -4 |
| 46 | -9 |
| 47 | -15 |
| 48 | -20 |
| 49 | -22 |
| 50 | -19 |
| 51 | -10 |
| 52 | 5 |
| 53 | 24 |
| 54 | 43 |
| 55 | 58 |
| 56 | 67 |
| 57 | 70 |
| 58 | 67 |
| 59 | 58 |
| 60 | 44 |
| 61 | 28 |
| 62 | 14 |
| 63 | 5 |
| 64 | 1 |
| 65 | 0 |
| 66 | -1 |
| 67 | -5 |
| 68 | -14 |
| 69 | -29 |
| 70 | -49 |
| 71 | -71 |
| 72 | -90 |
| 73 | -100 |
| 74 | -95 |
| 75 | -70 |
| 76 | -23 |
| 77 | 44 |
| 78 | 126 |
| 79 | 216 |
| 80 | 305 |
| 81 | 382 |
| 82 | 436 |
| 83 | 459 |
| 84 | 449 |
| 85 | 411 |