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 | 5 |
| 2 | 61 |
| 3 | 1065 |
| 4 | 23801 |
| 5 | 650893 |
| 6 | 21120373 |
| 7 | 794552657 |
| 8 | 34040573425 |
| 9 | 1637411510421 |
| 10 | 87420145670573 |
| 11 | 5131440522974329 |
| 12 | 328542298690792681 |
| 13 | 22789709877615373085 |
| 14 | 1702810951672313083621 |
| 15 | 136361486383932674632353 |