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 | 0 |
| 3 | -2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | -4 |
| 8 | 2 |
| 9 | 4 |
| 10 | -4 |
| 11 | 1 |
| 12 | 1 |
| 13 | 0 |
| 14 | -6 |
| 15 | 3 |
| 16 | 12 |
| 17 | -12 |
| 18 | -5 |
| 19 | 12 |
| 20 | -6 |
| 21 | 1 |
| 22 | 1 |
| 23 | 0 |
| 24 | -8 |
| 25 | 4 |
| 26 | 24 |
| 27 | -24 |
| 28 | -26 |
| 29 | 48 |
| 30 | -8 |
| 31 | -28 |
| 32 | 24 |
| 33 | -8 |
| 34 | 1 |
| 35 | 1 |
| 36 | 0 |
| 37 | -10 |
| 38 | 5 |
| 39 | 40 |
| 40 | -40 |
| 41 | -70 |
| 42 | 120 |
| 43 | 20 |
| 44 | -150 |
| 45 | 88 |
| 46 | 40 |
| 47 | -75 |
| 48 | 40 |
| 49 | -10 |
| 50 | 1 |
| 51 | 1 |
| 52 | 0 |
| 53 | -12 |
| 54 | 6 |
| 55 | 60 |
| 56 | -60 |
| 57 | -145 |
| 58 | 240 |
| 59 | 120 |
| 60 | -460 |
| 61 | 168 |
| 62 | 360 |
| 63 | -401 |
| 64 | 48 |
| 65 | 180 |
| 66 | -154 |
| 67 | 60 |
| 68 | -12 |
| 69 | 1 |
| 70 | 1 |
| 71 | 0 |
| 72 | -14 |
| 73 | 7 |
| 74 | 84 |
| 75 | -84 |
| 76 | -259 |
| 77 | 420 |
| 78 | 350 |
| 79 | -1085 |
| 80 | 168 |
| 81 | 1400 |
| 82 | -1197 |
| 83 | -504 |
| 84 | 1342 |
| 85 | -651 |
| 86 | -252 |
| 87 | 476 |
| 88 | -273 |
| 89 | 84 |
| 90 | -14 |
| 91 | 1 |