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 | 0 |
| 2 | 1 |
| 3 | -1 |
| 4 | 3 |
| 5 | -3 |
| 6 | 6 |
| 7 | -10 |
| 8 | 15 |
| 9 | -25 |
| 10 | 41 |
| 11 | -65 |
| 12 | 106 |
| 13 | -172 |
| 14 | 277 |
| 15 | -449 |
| 16 | 727 |
| 17 | -1175 |
| 18 | 1902 |
| 19 | -3078 |
| 20 | 4979 |
| 21 | -8057 |
| 22 | 13037 |
| 23 | -21093 |
| 24 | 34130 |
| 25 | -55224 |
| 26 | 89353 |
| 27 | -144577 |
| 28 | 233931 |
| 29 | -378507 |
| 30 | 612438 |
| 31 | -990946 |
| 32 | 1603383 |
| 33 | -2594329 |
| 34 | 4197713 |
| 35 | -6792041 |
| 36 | 10989754 |
| 37 | -17781796 |
| 38 | 28771549 |
| 39 | -46553345 |