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 | 4 |
| 2 | 16 |
| 3 | 269 |
| 4 | 97145 |
| 5 | 136932237232 |
| 6 | 20673377349936322828115 |
| 7 | 3064009179828599322781273131956055066080121287 |
| 8 | 26627889885770619250657085299814830308649653035272557146964038816993427725649965746421175612 |