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 | -8 |
| 5 | 1 |
| 6 | 1 |
| 7 | -69 |
| 8 | -69 |
| 9 | 1 |
| 10 | 1 |
| 11 | -374 |
| 12 | -974 |
| 13 | -374 |
| 14 | 1 |
| 15 | 1 |
| 16 | -1735 |
| 17 | -9330 |
| 18 | -9330 |
| 19 | -1735 |
| 20 | 1 |
| 21 | 1 |
| 22 | -7496 |
| 23 | -74969 |
| 24 | -152144 |
| 25 | -74969 |
| 26 | -7496 |
| 27 | 1 |
| 28 | 1 |
| 29 | -31241 |
| 30 | -545083 |
| 31 | -1983485 |
| 32 | -1983485 |
| 33 | -545083 |
| 34 | -31241 |
| 35 | 1 |
| 36 | 1 |
| 37 | -127754 |
| 38 | -3724784 |
| 39 | -22499414 |
| 40 | -39828194 |
| 41 | -22499414 |
| 42 | -3724784 |
| 43 | -127754 |
| 44 | 1 |