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 | 1 |
| 4 | -3 |
| 5 | 1 |
| 6 | 1 |
| 7 | 13 |
| 8 | 13 |
| 9 | 1 |
| 10 | 1 |
| 11 | -51 |
| 12 | 221 |
| 13 | -51 |
| 14 | 1 |
| 15 | 1 |
| 16 | 205 |
| 17 | 3485 |
| 18 | 3485 |
| 19 | 205 |
| 20 | 1 |
| 21 | 1 |
| 22 | -819 |
| 23 | 55965 |
| 24 | -219555 |
| 25 | 55965 |
| 26 | -819 |
| 27 | 1 |
| 28 | 1 |
| 29 | 3277 |
| 30 | 894621 |
| 31 | 14107485 |
| 32 | 14107485 |
| 33 | 894621 |
| 34 | 3277 |
| 35 | 1 |
| 36 | 1 |
| 37 | -13107 |
| 38 | 14317213 |
| 39 | -901984419 |
| 40 | 3625623645 |
| 41 | -901984419 |
| 42 | 14317213 |
| 43 | -13107 |
| 44 | 1 |
| 45 | 1 |