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 | 1 |
| 3 | 2 |
| 4 | 11 |
| 5 | 92 |
| 6 | 1097 |
| 7 | 19448 |
| 8 | 477136 |
| 9 | 14244856 |
| 10 | 537809179 |
| 11 | 24194010708 |
| 12 | 1317062528249 |