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 | 2 |
| 1 | -7 |
| 2 | 6 |
| 3 | -8 |
| 4 | 4 |
| 5 | -12 |
| 6 | -4 |
| 7 | -28 |
| 8 | -36 |
| 9 | -92 |
| 10 | -164 |
| 11 | -348 |
| 12 | -676 |
| 13 | -1372 |
| 14 | -2724 |
| 15 | -5468 |
| 16 | -10916 |
| 17 | -21852 |
| 18 | -43684 |
| 19 | -87388 |
| 20 | -174756 |
| 21 | -349532 |
| 22 | -699044 |
| 23 | -1398108 |
| 24 | -2796196 |
| 25 | -5592412 |
| 26 | -11184804 |
| 27 | -22369628 |
| 28 | -44739236 |
| 29 | -89478492 |
| 30 | -178956964 |
| 31 | -357913948 |
| 32 | -715827876 |