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 | 16 |
| 2 | 256 |
| 3 | 768 |
| 4 | 2889 |
| 5 | 12096 |
| 6 | 41013 |
| 7 | 133207 |
| 8 | 444912 |
| 9 | 1448128 |
| 10 | 4616800 |
| 11 | 14733663 |
| 12 | 46884096 |
| 13 | 148366461 |
| 14 | 468807885 |
| 15 | 1480447408 |
| 16 | 4669224000 |
| 17 | 14715790096 |
| 18 | 46366826149 |
| 19 | 146050380000 |
| 20 | 459933577353 |
| 21 | 1448231824455 |
| 22 | 4559797881648 |