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 | 0 |
| 3 | 0 |
| 4 | 202692 |
| 5 | 516096 |
| 6 | 29046528 |
| 7 | 145195008 |
| 8 | 1538419918 |
| 9 | 6537101312 |
| 10 | 36946043904 |
| 11 | 124680077312 |
| 12 | 511130138792 |
| 13 | 1419643330560 |
| 14 | 4752698632192 |