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 | 8 |
| 2 | 64 |
| 3 | 292 |
| 4 | 1164 |
| 5 | 5238 |
| 6 | 25046 |
| 7 | 116100 |
| 8 | 526418 |
| 9 | 2403976 |
| 10 | 11065442 |
| 11 | 50854642 |
| 12 | 233077382 |
| 13 | 1068505272 |
| 14 | 4902990456 |
| 15 | 22498260976 |
| 16 | 103204910914 |
| 17 | 473409837692 |
| 18 | 2171794653270 |
| 19 | 9963444579674 |
| 20 | 45707359388096 |
| 21 | 209680588779494 |