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 | 30 |
| 2 | 1211 |
| 3 | 68060 |
| 4 | 5162421 |
| 5 | 510964090 |
| 6 | 64108947631 |
| 7 | 9954077496120 |
| 8 | 1874917179220841 |
| 9 | 421327494210872150 |
| 10 | 111374995513203846051 |
| 11 | 34217341079365673500180 |
| 12 | 12091183195611248756287261 |