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 | 0 |
| 4 | -1 |
| 5 | -1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 2 |
| 9 | 1 |
| 10 | -1 |
| 11 | -3 |
| 12 | -3 |
| 13 | 0 |
| 14 | 3 |
| 15 | 5 |
| 16 | 3 |
| 17 | -2 |
| 18 | -6 |
| 19 | -6 |
| 20 | -1 |
| 21 | 6 |
| 22 | 9 |
| 23 | 5 |
| 24 | -4 |
| 25 | -12 |
| 26 | -11 |
| 27 | -1 |
| 28 | 12 |
| 29 | 18 |
| 30 | 10 |
| 31 | -7 |
| 32 | -21 |
| 33 | -21 |
| 34 | -3 |
| 35 | 20 |
| 36 | 30 |
| 37 | 17 |
| 38 | -13 |
| 39 | -37 |
| 40 | -35 |
| 41 | -4 |
| 42 | 36 |
| 43 | 53 |
| 44 | 30 |
| 45 | -20 |
| 46 | -62 |
| 47 | -59 |
| 48 | -8 |
| 49 | 57 |
| 50 | 85 |
| 51 | 47 |
| 52 | -35 |
| 53 | -101 |
| 54 | -95 |
| 55 | -11 |
| 56 | 94 |
| 57 | 138 |
| 58 | 78 |
| 59 | -54 |
| 60 | -159 |
| 61 | -150 |
| 62 | -19 |
| 63 | 145 |
| 64 | 213 |
| 65 | 118 |
| 66 | -85 |
| 67 | -247 |
| 68 | -231 |
| 69 | -27 |
| 70 | 225 |
| 71 | 330 |
| 72 | 183 |
| 73 | -128 |
| 74 | -375 |