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 | 44 |
| 2 | 45 |
| 3 | 20 |
| 4 | 10 |
| 5 | 0 |
| 6 | 1 |
| 7 | 13756 |
| 8 | 30480 |
| 9 | 32365 |
| 10 | 21760 |
| 11 | 10300 |
| 12 | 3568 |
| 13 | 970 |
| 14 | 160 |
| 15 | 40 |
| 16 | 0 |
| 17 | 1 |
| 18 | 6699824 |
| 19 | 23123880 |
| 20 | 38358540 |
| 21 | 40563765 |
| 22 | 30573900 |
| 23 | 17399178 |
| 24 | 7723640 |
| 25 | 2729295 |
| 26 | 776520 |
| 27 | 180100 |
| 28 | 33372 |
| 29 | 5355 |
| 30 | 540 |
| 31 | 90 |
| 32 | 0 |
| 33 | 1 |