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 | 55 |
| 3 | 27723 |
| 4 | 1084714750 |
| 5 | 2579620657453546201 |
| 6 | 120904392155429552198250382953194665437 |
| 7 | 29567118984689950525496948880094499522270777838300280083816338513462653571335 |