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 | 65 |
| 3 | 6305 |
| 4 | 42981185 |
| 5 | 1853015893884545 |
| 6 | 3433683820274065740584139537665 |
| 7 | 11790184577738583171520532579045597727214748217668409340885505 |