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 | 1 |
| 2 | 2241 |
| 3 | 18395521 |
| 4 | 22005481 |
| 5 | 180674890281 |
| 6 | 1483422094617961 |
| 7 | 1774530705782041 |
| 8 | 14569695060825930201 |
| 9 | 119623748111985974353561 |
| 10 | 143098862377484625247441 |
| 11 | 1174906008443637039413730321 |
| 12 | 9646506658002296058866816899921 |
| 13 | 11539549215467584644303744700081 |