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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 19147 |
| 4 | 129505699483 |
| 5 | 674344345281 |
| 6 | 1643434407157 |
| 7 | 5675297754009 |
| 8 | 12174063716147 |
| 9 | 162466075477787 |
| 10 | 313255455573801 |
| 11 | 324082741109271 |