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 | 6 |
| 2 | 36 |
| 3 | 216 |
| 4 | 1291 |
| 5 | 7686 |
| 6 | 45590 |
| 7 | 269472 |
| 8 | 1587450 |
| 9 | 9321628 |
| 10 | 54569340 |
| 11 | 318513432 |
| 12 | 1853885152 |
| 13 | 10761305560 |
| 14 | 62304937944 |
| 15 | 359833051280 |
| 16 | 2073213227007 |
| 17 | 11917692236634 |
| 18 | 68357220234784 |
| 19 | 391252708773072 |
| 20 | 2234836878469971 |