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 | -3 |
| 5 | 1 |
| 6 | 7 |
| 7 | 9 |
| 8 | 1 |
| 9 | -15 |
| 10 | -25 |
| 11 | -11 |
| 12 | 29 |
| 13 | 65 |
| 14 | 47 |
| 15 | -47 |
| 16 | -159 |
| 17 | -159 |
| 18 | 47 |
| 19 | 365 |
| 20 | 477 |
| 21 | 65 |
| 22 | -777 |
| 23 | -1319 |
| 24 | -607 |
| 25 | 1489 |
| 26 | 3415 |
| 27 | 2533 |
| 28 | -2371 |
| 29 | -8319 |
| 30 | -8481 |
| 31 | 2209 |
| 32 | 19009 |
| 33 | 25281 |
| 34 | 4063 |
| 35 | -40227 |
| 36 | -69571 |
| 37 | -33407 |
| 38 | 76391 |
| 39 | 179369 |
| 40 | 136385 |