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) |
|---|---|
| 0 | 1 |
| 1 | -1 |
| 2 | 1 |
| 3 | -1 |
| 4 | -2 |
| 5 | 1 |
| 6 | 3 |
| 7 | -1 |
| 8 | -3 |
| 9 | 1 |
| 10 | 1 |
| 11 | 8 |
| 12 | 0 |
| 13 | -4 |
| 14 | 1 |
| 15 | -9 |
| 16 | -3 |
| 17 | 14 |
| 18 | 2 |
| 19 | -5 |
| 20 | 1 |
| 21 | 1 |
| 22 | -26 |
| 23 | -15 |
| 24 | 20 |
| 25 | 5 |
| 26 | -6 |
| 27 | 1 |
| 28 | 27 |
| 29 | 27 |
| 30 | -45 |
| 31 | -37 |
| 32 | 25 |
| 33 | 9 |
| 34 | -7 |
| 35 | 1 |
| 36 | -13 |
| 37 | 76 |
| 38 | 98 |
| 39 | -56 |
| 40 | -70 |
| 41 | 28 |
| 42 | 14 |
| 43 | -8 |
| 44 | 1 |
| 45 | -81 |
| 46 | -135 |
| 47 | 108 |
| 48 | 228 |
| 49 | -46 |
| 50 | -114 |
| 51 | 28 |
| 52 | 20 |
| 53 | -9 |
| 54 | 1 |
| 55 | 67 |
| 56 | -202 |
| 57 | -459 |
| 58 | 48 |
| 59 | 420 |
| 60 | 0 |
| 61 | -168 |
| 62 | 24 |
| 63 | 27 |
| 64 | -10 |
| 65 | 1 |
| 66 | 243 |
| 67 | 567 |
| 68 | -135 |
| 69 | -1035 |
| 70 | -210 |
| 71 | 662 |
| 72 | 98 |
| 73 | -230 |
| 74 | 15 |
| 75 | 35 |
| 76 | -11 |
| 77 | 1 |
| 78 | -285 |