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 | 83 |
| 4 | 227 |
| 5 | 24157811 |
| 6 | 2971215067 |
| 7 | 53316291167 |
| 8 | 5527939700884751 |
| 9 | 99194853094755491 |
| 10 | 420196140727489667 |
| 11 | 4660046610375530303 |
| 12 | 83621143489848422971 |
| 13 | 1066340417491710595814572163 |