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 | 12 |
| 5 | 1 |
| 6 | 1 |
| 7 | 133 |
| 8 | 133 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1464 |
| 12 | 16226 |
| 13 | 1464 |
| 14 | 1 |
| 15 | 1 |
| 16 | 16105 |
| 17 | 1964810 |
| 18 | 1964810 |
| 19 | 16105 |
| 20 | 1 |
| 21 | 1 |
| 22 | 177156 |
| 23 | 237758115 |
| 24 | 2617126920 |
| 25 | 237758115 |
| 26 | 177156 |
| 27 | 1 |
| 28 | 1 |
| 29 | 1948717 |
| 30 | 28768909071 |
| 31 | 3483633688635 |
| 32 | 3483633688635 |