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 | 19 |
| 2 | 37 |
| 3 | 223 |
| 4 | 409 |
| 5 | 53617 |
| 6 | 23757289 |
| 7 | 3111662089 |
| 8 | 407556643177 |
| 9 | 1372675688565303822697 |
| 10 | 23548271681390871672120649 |
| 11 | 1676892190264006259992141409 |
| 12 | 64923481849284379431377700019 |