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 | -2 |
| 5 | 1 |
| 6 | 1 |
| 7 | -13 |
| 8 | -13 |
| 9 | 1 |
| 10 | 1 |
| 11 | -44 |
| 12 | -74 |
| 13 | -44 |
| 14 | 1 |
| 15 | 1 |
| 16 | -123 |
| 17 | -278 |
| 18 | -278 |
| 19 | -123 |
| 20 | 1 |
| 21 | 1 |
| 22 | -314 |
| 23 | -881 |
| 24 | -1196 |
| 25 | -881 |
| 26 | -314 |
| 27 | 1 |
| 28 | 1 |
| 29 | -761 |
| 30 | -2539 |
| 31 | -4317 |
| 32 | -4317 |
| 33 | -2539 |
| 34 | -761 |
| 35 | 1 |
| 36 | 1 |
| 37 | -1784 |
| 38 | -6884 |
| 39 | -14024 |
| 40 | -17594 |
| 41 | -14024 |
| 42 | -6884 |
| 43 | -1784 |
| 44 | 1 |
| 45 | 1 |
| 46 | -4087 |
| 47 | -17884 |
| 48 | -42412 |
| 49 | -63874 |
| 50 | -63874 |
| 51 | -42412 |
| 52 | -17884 |
| 53 | -4087 |
| 54 | 1 |