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 | 1 |
| 2 | 7 |
| 3 | 381 |
| 4 | 502789 |
| 5 | 33572762781 |
| 6 | 175123095782787181 |
| 7 | 99374457734129265819664221 |
| 8 | 8158897372191288496224413025490409437 |
| 9 | 124778468912108975502836576328262294089846582756189 |