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 | -1 |
| 4 | -1 |
| 5 | -1 |
| 6 | -3 |
| 7 | -3 |
| 8 | -2 |
| 9 | -2 |
| 10 | -2 |
| 11 | -2 |
| 12 | -1 |
| 13 | 1 |
| 14 | 1 |
| 15 | 2 |
| 16 | 5 |
| 17 | 7 |
| 18 | 7 |
| 19 | 8 |
| 20 | 11 |
| 21 | 12 |
| 22 | 12 |
| 23 | 13 |
| 24 | 15 |
| 25 | 16 |
| 26 | 14 |
| 27 | 12 |
| 28 | 12 |
| 29 | 11 |
| 30 | 6 |
| 31 | 2 |
| 32 | 1 |
| 33 | -3 |
| 34 | -10 |
| 35 | -17 |
| 36 | -21 |
| 37 | -27 |
| 38 | -37 |
| 39 | -45 |
| 40 | -50 |
| 41 | -57 |
| 42 | -68 |
| 43 | -77 |
| 44 | -81 |
| 45 | -86 |
| 46 | -96 |
| 47 | -102 |
| 48 | -101 |
| 49 | -103 |
| 50 | -108 |
| 51 | -109 |
| 52 | -103 |
| 53 | -97 |
| 54 | -95 |
| 55 | -88 |
| 56 | -71 |
| 57 | -54 |
| 58 | -42 |
| 59 | -24 |
| 60 | 5 |