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 | -2 |
| 3 | 1 |
| 4 | 2 |
| 5 | 4 |
| 6 | -2 |
| 7 | -3 |
| 8 | -5 |
| 9 | -9 |
| 10 | 5 |
| 11 | 7 |
| 12 | 10 |
| 13 | 15 |
| 14 | 24 |
| 15 | -16 |
| 16 | -21 |
| 17 | -28 |
| 18 | -38 |
| 19 | -53 |
| 20 | -77 |
| 21 | 61 |
| 22 | 77 |
| 23 | 98 |
| 24 | 126 |
| 25 | 164 |
| 26 | 217 |
| 27 | 294 |
| 28 | -272 |
| 29 | -333 |
| 30 | -410 |
| 31 | -508 |
| 32 | -634 |
| 33 | -798 |
| 34 | -1015 |
| 35 | -1309 |
| 36 | 1385 |
| 37 | 1657 |
| 38 | 1990 |
| 39 | 2400 |
| 40 | 2908 |
| 41 | 3542 |
| 42 | 4340 |
| 43 | 5355 |
| 44 | 6664 |