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 | 10 |
| 2 | 56 |
| 3 | 78 |
| 4 | 0 |
| 5 | 1014 |
| 6 | 5832 |
| 7 | 8412 |
| 8 | 0 |
| 9 | 118560 |
| 10 | 691352 |
| 11 | 1009378 |
| 12 | 0 |
| 13 | 14741482 |
| 14 | 86567880 |
| 15 | 127201108 |
| 16 | 0 |
| 17 | 1895190810 |
| 18 | 11176778256 |
| 19 | 16487950878 |
| 20 | 0 |
| 21 | 248820363000 |
| 22 | 1471592159928 |
| 23 | 2176717161564 |
| 24 | 0 |
| 25 | 33142566417012 |
| 26 | 196414950943848 |