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 | 0 |
| 4 | -1 |
| 5 | -2 |
| 6 | -2 |
| 7 | -2 |
| 8 | -1 |
| 9 | 1 |
| 10 | 3 |
| 11 | 5 |
| 12 | 6 |
| 13 | 5 |
| 14 | 2 |
| 15 | -3 |
| 16 | -9 |
| 17 | -14 |
| 18 | -16 |
| 19 | -13 |
| 20 | -4 |
| 21 | 10 |
| 22 | 26 |
| 23 | 39 |
| 24 | 43 |
| 25 | 33 |
| 26 | 7 |
| 27 | -32 |
| 28 | -75 |
| 29 | -108 |
| 30 | -115 |
| 31 | -83 |
| 32 | -8 |
| 33 | 100 |
| 34 | 215 |
| 35 | 298 |
| 36 | 306 |
| 37 | 206 |
| 38 | -9 |
| 39 | -307 |
| 40 | -613 |
| 41 | -819 |
| 42 | -810 |
| 43 | -503 |
| 44 | 110 |
| 45 | 929 |
| 46 | 1739 |
| 47 | 2242 |
| 48 | 2132 |
| 49 | 1203 |
| 50 | -536 |
| 51 | -2778 |
| 52 | -4910 |
| 53 | -6113 |
| 54 | -5577 |