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 | 191373251117 |
| 3 | 37291913732511172331 |
| 4 | 1391311131071018979716153433729191373251117233141475967738397103109127137149 |