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 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 3 |
| 8 | -3 |
| 9 | -1 |
| 10 | 1 |
| 11 | 8 |
| 12 | -12 |
| 13 | 8 |
| 14 | 1 |
| 15 | 1 |
| 16 | 15 |
| 17 | -20 |
| 18 | 20 |
| 19 | -15 |
| 20 | -1 |
| 21 | 1 |
| 22 | 24 |
| 23 | -15 |
| 24 | 0 |
| 25 | -15 |
| 26 | 24 |
| 27 | 1 |
| 28 | 1 |
| 29 | 35 |
| 30 | 21 |
| 31 | -105 |
| 32 | 105 |
| 33 | -21 |
| 34 | -35 |
| 35 | -1 |
| 36 | 1 |
| 37 | 48 |
| 38 | 112 |
| 39 | -336 |
| 40 | 420 |
| 41 | -336 |
| 42 | 112 |
| 43 | 48 |
| 44 | 1 |
| 45 | 1 |
| 46 | 63 |
| 47 | 288 |
| 48 | -672 |
| 49 | 756 |
| 50 | -756 |
| 51 | 672 |
| 52 | -288 |
| 53 | -63 |
| 54 | -1 |
| 55 | 1 |
| 56 | 80 |
| 57 | 585 |
| 58 | -960 |
| 59 | 420 |
| 60 | 0 |
| 61 | 420 |
| 62 | -960 |
| 63 | 585 |
| 64 | 80 |
| 65 | 1 |
| 66 | 1 |
| 67 | 99 |
| 68 | 1045 |
| 69 | -825 |
| 70 | -1980 |
| 71 | 4620 |
| 72 | -4620 |
| 73 | 1980 |
| 74 | 825 |
| 75 | -1045 |
| 76 | -99 |
| 77 | -1 |