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 | -3 |
| 5 | -5 |
| 6 | -7 |
| 7 | -9 |
| 8 | -11 |
| 9 | -14 |
| 10 | -17 |
| 11 | -20 |
| 12 | -22 |
| 13 | -25 |
| 14 | -28 |
| 15 | -32 |
| 16 | -34 |
| 17 | -37 |
| 18 | -41 |
| 19 | -44 |
| 20 | -47 |
| 21 | -51 |
| 22 | -54 |
| 23 | -57 |
| 24 | -60 |
| 25 | -62 |
| 26 | -66 |
| 27 | -69 |
| 28 | -72 |
| 29 | -75 |
| 30 | -78 |
| 31 | -81 |
| 32 | -84 |
| 33 | -87 |
| 34 | -90 |
| 35 | -92 |
| 36 | -94 |
| 37 | -98 |
| 38 | -100 |
| 39 | -102 |
| 40 | -104 |
| 41 | -106 |
| 42 | -108 |
| 43 | -110 |
| 44 | -111 |
| 45 | -113 |
| 46 | -114 |
| 47 | -116 |
| 48 | -117 |
| 49 | -117 |
| 50 | -118 |