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) |
|---|---|
| 2 | 1 |
| 3 | 21 |
| 4 | 546 |
| 5 | 13546 |
| 6 | 339171 |
| 7 | 8476671 |
| 8 | 211929796 |
| 9 | 5298179796 |
| 10 | 132454820421 |
| 11 | 3311368882921 |
| 12 | 82784230211046 |
| 13 | 2069605714586046 |
| 14 | 51740143068101671 |
| 15 | 1293503575685289171 |
| 16 | 32337589397218492296 |
| 17 | 808439734905030992296 |