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 | 9 |
| 4 | 198 |
| 5 | 10710 |
| 6 | 1384335 |
| 7 | 416990763 |
| 8 | 286992935964 |
| 9 | 444374705175516 |
| 10 | 1528973599758889005 |
| 11 | 11573608032229769067465 |
| 12 | 191141381932394665770442818 |
| 13 | 6839625961762363728765713227698 |