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 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | -1 |
| 8 | -2 |
| 9 | 0 |
| 10 | 2 |
| 11 | 2 |
| 12 | -1 |
| 13 | -3 |
| 14 | -1 |
| 15 | 3 |
| 16 | 3 |
| 17 | -2 |
| 18 | -5 |
| 19 | -1 |
| 20 | 6 |
| 21 | 5 |
| 22 | -3 |
| 23 | -8 |
| 24 | -2 |
| 25 | 8 |
| 26 | 7 |
| 27 | -5 |
| 28 | -12 |
| 29 | -2 |
| 30 | 13 |
| 31 | 12 |
| 32 | -7 |
| 33 | -18 |
| 34 | -4 |
| 35 | 18 |
| 36 | 16 |
| 37 | -11 |
| 38 | -26 |
| 39 | -5 |
| 40 | 27 |
| 41 | 24 |
| 42 | -14 |
| 43 | -37 |
| 44 | -8 |
| 45 | 37 |
| 46 | 33 |
| 47 | -21 |
| 48 | -52 |
| 49 | -10 |
| 50 | 53 |
| 51 | 47 |
| 52 | -29 |
| 53 | -72 |
| 54 | -15 |
| 55 | 71 |
| 56 | 63 |
| 57 | -40 |
| 58 | -98 |
| 59 | -19 |
| 60 | 99 |
| 61 | 88 |
| 62 | -53 |
| 63 | -133 |
| 64 | -27 |
| 65 | 131 |
| 66 | 115 |
| 67 | -73 |
| 68 | -178 |
| 69 | -35 |
| 70 | 177 |
| 71 | 156 |
| 72 | -95 |
| 73 | -236 |
| 74 | -48 |
| 75 | 232 |
| 76 | 204 |
| 77 | -127 |
| 78 | -311 |