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 | 13 |
| 3 | 254 |
| 4 | 3227 |
| 5 | 32970 |
| 6 | 292103 |
| 7 | 2303283 |
| 8 | 16388502 |
| 9 | 106287822 |
| 10 | 633822588 |
| 11 | 3502418937 |
| 12 | 18058528687 |