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 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 3767 |
| 5 | 19913 |
| 6 | 726109 |
| 7 | 4827859 |
| 8 | 59069473 |
| 9 | 179993463679 |
| 10 | 2280987436223 |