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 | 7 |
| 3 | 103 |
| 4 | 274309092506641744944619304235289 |
| 5 | 71913864933263337464162651213311153 |
| 6 | 23583673968885646741228783732071635618505511 |