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 | 0 |
| 2 | 30 |
| 3 | 608 |
| 4 | 8740 |
| 5 | 109296 |
| 6 | 1269450 |
| 7 | 14096320 |
| 8 | 151927776 |
| 9 | 1603346160 |
| 10 | 16659866938 |
| 11 | 171064877280 |