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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1 |
| 9 | -1 |
| 10 | 1 |
| 11 | 0 |
| 12 | 0 |
| 13 | 2 |
| 14 | -2 |
| 15 | 1 |
| 16 | 1 |
| 17 | -2 |
| 18 | 4 |
| 19 | -3 |
| 20 | 1 |
| 21 | 3 |
| 22 | -6 |
| 23 | 7 |
| 24 | -3 |
| 25 | -2 |
| 26 | 9 |
| 27 | -13 |
| 28 | 11 |
| 29 | -1 |
| 30 | -11 |
| 31 | 22 |
| 32 | -23 |
| 33 | 12 |
| 34 | 10 |
| 35 | -33 |
| 36 | 46 |
| 37 | -35 |
| 38 | 2 |
| 39 | 43 |
| 40 | -78 |
| 41 | 81 |
| 42 | -37 |
| 43 | -41 |
| 44 | 122 |
| 45 | -159 |
| 46 | 118 |
| 47 | 4 |
| 48 | -162 |
| 49 | 281 |
| 50 | -277 |
| 51 | 114 |
| 52 | 167 |
| 53 | -443 |
| 54 | 558 |
| 55 | -391 |
| 56 | -52 |
| 57 | 610 |
| 58 | -1001 |
| 59 | 949 |
| 60 | -338 |
| 61 | -662 |