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 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | -1 |
| 8 | 0 |
| 9 | 0 |
| 10 | -1 |
| 11 | 1 |
| 12 | 0 |
| 13 | -1 |
| 14 | 2 |
| 15 | -1 |
| 16 | -1 |
| 17 | 3 |
| 18 | -3 |
| 19 | 0 |
| 20 | 4 |
| 21 | -6 |
| 22 | 3 |
| 23 | 4 |
| 24 | -10 |
| 25 | 9 |
| 26 | 1 |
| 27 | -14 |
| 28 | 19 |
| 29 | -8 |
| 30 | -15 |
| 31 | 33 |
| 32 | -27 |
| 33 | -7 |
| 34 | 48 |
| 35 | -60 |
| 36 | 20 |
| 37 | 55 |
| 38 | -108 |
| 39 | 80 |
| 40 | 35 |
| 41 | -163 |
| 42 | 188 |
| 43 | -45 |
| 44 | -198 |
| 45 | 351 |
| 46 | -233 |
| 47 | -153 |
| 48 | 549 |
| 49 | -584 |
| 50 | 80 |
| 51 | 702 |
| 52 | -1133 |
| 53 | 664 |
| 54 | 622 |
| 55 | -1835 |
| 56 | 1797 |
| 57 | -42 |
| 58 | -2457 |
| 59 | 3632 |
| 60 | -1839 |