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 | 4 |
| 3 | 9 |
| 4 | 49 |
| 5 | 144 |
| 6 | 441 |
| 7 | 1444 |
| 8 | 11449 |
| 9 | 44944 |
| 10 | 991494144 |
| 11 | 4914991449 |
| 12 | 149991994944 |
| 13 | 9141411499911441 |
| 14 | 199499144494999441 |
| 15 | 9914419419914449449 |
| 16 | 444411911999914911441 |
| 17 | 419994999149149944149149944191494441 |