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 | 2 |
| 3 | 1 |
| 4 | 0 |
| 5 | 196 |
| 6 | 0 |
| 7 | 32 |
| 8 | 0 |
| 9 | 75272 |
| 10 | 1 |
| 11 | 0 |
| 12 | 31329 |
| 13 | 0 |
| 14 | 599466256 |
| 15 | 0 |
| 16 | 450 |
| 17 | 0 |
| 18 | 135663392 |
| 19 | 0 |
| 20 | 28838245503008 |
| 21 | 1 |
| 22 | 0 |
| 23 | 4941729 |
| 24 | 0 |
| 25 | 10956424382401 |
| 26 | 0 |
| 27 | 22463213552677201984 |
| 28 | 0 |
| 29 | 6272 |
| 30 | 0 |
| 31 | 233075146752 |
| 32 | 0 |
| 33 | 5652453608244879872 |
| 34 | 0 |
| 35 | 123818965842734619629420672 |