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) |
|---|---|
| 0 | 2 |
| 1 | 3 |
| 2 | 227 |
| 3 | 729 |
| 4 | 22965 |
| 5 | 380555 |
| 6 | 156346 |
| 7 | 10920166 |
| 8 | 202913258 |
| 9 | 2973399074 |
| 10 | 39284376410 |
| 11 | 489544827463 |
| 12 | 5874954672992 |