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 | 5 |
| 2 | 9 |
| 3 | 15 |
| 4 | 50943795 |
| 5 | 40874929095 |
| 6 | 616517522595975 |
| 7 | 93487500801880185 |
| 8 | 64606701602327559675 |