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 | 6 |
| 2 | 58 |
| 3 | 822 |
| 4 | 15514 |
| 5 | 366006 |
| 6 | 10361818 |
| 7 | 342239862 |
| 8 | 12918651034 |
| 9 | 548600581686 |
| 10 | 25885279045978 |
| 11 | 1343513774912502 |
| 12 | 76071145660848154 |
| 13 | 4666162902628259766 |
| 14 | 308236822886732856538 |
| 15 | 21815861409181135034742 |
| 16 | 1646982315540717414270874 |
| 17 | 132109620398598537723816246 |