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) |
|---|---|
| 1 | 2 |
| 2 | 1 |
| 3 | 2 |
| 4 | 0 |
| 5 | 4 |
| 6 | -2 |
| 7 | 0 |
| 8 | 2 |
| 9 | 6 |
| 10 | -4 |
| 11 | 6 |
| 12 | -4 |
| 13 | -6 |
| 14 | 10 |
| 15 | 2 |
| 16 | -2 |
| 17 | 12 |
| 18 | -10 |
| 19 | -2 |
| 20 | 8 |
| 21 | 2 |
| 22 | -4 |
| 23 | 8 |
| 24 | 4 |
| 25 | -16 |
| 26 | 8 |
| 27 | 10 |
| 28 | -8 |
| 29 | 10 |
| 30 | -8 |
| 31 | -8 |
| 32 | 14 |
| 33 | 14 |
| 34 | -26 |
| 35 | 26 |
| 36 | -14 |
| 37 | -36 |
| 38 | 42 |
| 39 | 20 |
| 40 | -22 |
| 41 | 68 |
| 42 | -66 |
| 43 | -60 |
| 44 | 14 |
| 45 | -10 |
| 46 | 60 |
| 47 | 40 |
| 48 | -74 |
| 49 | -38 |
| 50 | -66 |
| 51 | 10 |
| 52 | 134 |
| 53 | 44 |
| 54 | -98 |
| 55 | -64 |
| 56 | -54 |
| 57 | 22 |
| 58 | 156 |
| 59 | 20 |
| 60 | -18 |
| 61 | -34 |
| 62 | -240 |
| 63 | 10 |
| 64 | 256 |
| 65 | 32 |
| 66 | -18 |
| 67 | -6 |
| 68 | -144 |
| 69 | -72 |
| 70 | 226 |
| 71 | 70 |
| 72 | -68 |
| 73 | -50 |
| 74 | -184 |
| 75 | 58 |
| 76 | 236 |
| 77 | 82 |