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) |
|---|---|
| 0 | 1 |
| 1 | 11 |
| 2 | 2447 |
| 3 | 238043 |
| 4 | 559440199 |
| 5 | 29128857391 |
| 6 | 9447595434410813 |
| 7 | 225037938358318573 |
| 8 | 3651003047854884043877 |
| 9 | 104388909491649724435759747 |
| 10 | 1372557084260440289321615059133 |
| 11 | 107881945709178295095123859185817 |
| 12 | 98682616643700175634367947900986085893 |