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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 0 |
| 7 | 9 |
| 8 | 0 |
| 9 | 9 |
| 10 | 0 |
| 11 | 1 |
| 12 | 56 |
| 13 | 216 |
| 14 | 378 |
| 15 | 435 |
| 16 | 324 |
| 17 | 189 |
| 18 | 54 |
| 19 | 27 |
| 20 | 0 |
| 21 | 1 |
| 22 | 13833 |
| 23 | 49464 |
| 24 | 84510 |
| 25 | 90944 |
| 26 | 69039 |
| 27 | 38448 |
| 28 | 16476 |
| 29 | 5184 |
| 30 | 1431 |
| 31 | 216 |
| 32 | 54 |
| 33 | 0 |
| 34 | 1 |
| 35 | 6699824 |
| 36 | 23123880 |
| 37 | 38358540 |
| 38 | 40563765 |
| 39 | 30573900 |
| 40 | 17399178 |
| 41 | 7723640 |