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 | -3 |
| 4 | 5 |
| 5 | -8 |
| 6 | 12 |
| 7 | -21 |
| 8 | 37 |
| 9 | -59 |
| 10 | 92 |
| 11 | -153 |
| 12 | 256 |
| 13 | -409 |
| 14 | 654 |
| 15 | -1073 |
| 16 | 1754 |
| 17 | -2824 |
| 18 | 4552 |
| 19 | -7394 |
| 20 | 12010 |
| 21 | -19406 |
| 22 | 31337 |
| 23 | -50782 |
| 24 | 82306 |
| 25 | -133072 |
| 26 | 215152 |
| 27 | -348346 |
| 28 | 563939 |
| 29 | -912217 |
| 30 | 1475604 |
| 31 | -2388075 |
| 32 | 3864808 |
| 33 | -6252750 |
| 34 | 10115987 |
| 35 | -16369340 |
| 36 | 26488326 |
| 37 | -42857128 |