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 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 2 |
| 8 | 1 |
| 9 | 0 |
| 10 | -1 |
| 11 | -3 |
| 12 | -5 |
| 13 | -5 |
| 14 | -3 |
| 15 | 0 |
| 16 | 4 |
| 17 | 9 |
| 18 | 13 |
| 19 | 13 |
| 20 | 8 |
| 21 | -1 |
| 22 | -13 |
| 23 | -26 |
| 24 | -35 |
| 25 | -34 |
| 26 | -20 |
| 27 | 6 |
| 28 | 40 |
| 29 | 74 |
| 30 | 95 |
| 31 | 89 |
| 32 | 48 |
| 33 | -26 |
| 34 | -120 |
| 35 | -209 |
| 36 | -258 |
| 37 | -232 |
| 38 | -111 |
| 39 | 98 |
| 40 | 355 |
| 41 | 587 |
| 42 | 699 |
| 43 | 601 |
| 44 | 245 |
| 45 | -342 |
| 46 | -1040 |
| 47 | -1641 |
| 48 | -1887 |
| 49 | -1545 |
| 50 | -504 |
| 51 | 1137 |
| 52 | 3023 |
| 53 | 4568 |
| 54 | 5073 |
| 55 | 3936 |
| 56 | 912 |