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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 16 |
| 5 | 1 |
| 6 | 252 |
| 7 | 1 |
| 8 | 64 |
| 9 | 729 |
| 10 | 100100 |
| 11 | 1 |
| 12 | 248976 |
| 13 | 1 |
| 14 | 105413700 |
| 15 | 762750 |
| 16 | 256 |
| 17 | 1 |
| 18 | 1895400 |
| 19 | 1 |
| 20 | 1280000400 |
| 21 | 1801097802 |
| 22 | 584318301411812 |
| 23 | 1 |
| 24 | 7963200 |
| 25 | 9765625 |
| 26 | 2481152873203737252 |
| 27 | 19683 |
| 28 | 10578455954192 |
| 29 | 1 |
| 30 | 677994300000 |
| 31 | 1 |
| 32 | 1024 |
| 33 | 50542106513762754 |