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 | 11 |
| 2 | 21 |
| 3 | 26 |
| 4 | 68 |
| 5 | 656 |
| 6 | 2336 |
| 7 | 8768 |
| 8 | 133376 |
| 9 | 528896 |
| 10 | 34360918016 |
| 11 | 35184409837568 |
| 12 | 576460757135261696 |