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 | 3 |
| 3 | 147 |
| 4 | 86436 |
| 5 | 5273373924 |
| 6 | 8686528282691532 |
| 7 | 4111538282327563523497152 |
| 8 | 93412216233151136505901971387334656 |
| 9 | 1219854711057286573050999646270927427863304749056 |