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) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 9 |
| 5 | 9 |
| 6 | 8 |
| 7 | 0 |
| 8 | 9 |
| 9 | 18 |
| 10 | 26 |
| 11 | 405 |
| 12 | 405 |
| 13 | 396 |
| 14 | 378 |
| 15 | 352 |
| 16 | 0 |
| 17 | 405 |
| 18 | 810 |
| 19 | 1206 |
| 20 | 1584 |
| 21 | 1936 |
| 22 | 44469 |
| 23 | 44469 |
| 24 | 44064 |
| 25 | 43254 |
| 26 | 42048 |
| 27 | 40464 |
| 28 | 38528 |
| 29 | 0 |
| 30 | 44469 |
| 31 | 88938 |
| 32 | 133002 |
| 33 | 176256 |
| 34 | 218304 |
| 35 | 258768 |
| 36 | 297296 |
| 37 | 9086985 |
| 38 | 9086985 |
| 39 | 9042516 |
| 40 | 8953578 |
| 41 | 8820576 |
| 42 | 8644320 |
| 43 | 8426016 |
| 44 | 8167248 |
| 45 | 7869952 |