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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 5 |
| 6 | 202 |
| 7 | 2779 |
| 8 | 34881 |
| 9 | 389634 |
| 10 | 4106969 |
| 11 | 41731672 |
| 12 | 414087760 |
| 13 | 4043811134 |
| 14 | 39077574251 |
| 15 | 374986732902 |
| 16 | 3581487844657 |
| 17 | 34101194196910 |
| 18 | 324058813028738 |