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 | 6 |
| 4 | 36 |
| 5 | 432 |
| 6 | 31104 |
| 7 | 26873856 |
| 8 | 1671768834048 |
| 9 | 89853749822987698176 |
| 10 | 300429397152833661135077712592896 |
| 11 | 53989415782483456907192461472369228929621535219515392 |