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 | -3 |
| 2 | -6 |
| 3 | 6 |
| 4 | 14 |
| 5 | -19 |
| 6 | -37 |
| 7 | 56 |
| 8 | 96 |
| 9 | -164 |
| 10 | -247 |
| 11 | 477 |
| 12 | 630 |
| 13 | -1378 |
| 14 | -1590 |
| 15 | 3957 |
| 16 | 3963 |
| 17 | -11300 |
| 18 | -9728 |
| 19 | 32104 |
| 20 | 23425 |
| 21 | -90771 |
| 22 | -55006 |
| 23 | 255478 |
| 24 | 124758 |
| 25 | -715923 |
| 26 | -268757 |
| 27 | 1997808 |
| 28 | 531552 |
| 29 | -5552220 |
| 30 | -884695 |
| 31 | 15368813 |
| 32 | 834686 |
| 33 | -42373618 |
| 34 | 2113458 |
| 35 | 116369557 |
| 36 | -17926357 |