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 | 3 |
| 2 | 27 |
| 3 | 576 |
| 4 | 4896 |
| 5 | 63455 |
| 6 | 531864 |
| 7 | 5916807 |
| 8 | 49852089 |
| 9 | 513363015 |
| 10 | 4356708120 |
| 11 | 43202639844 |
| 12 | 369377896383 |
| 13 | 3577597178939 |
| 14 | 30801614053968 |
| 15 | 293760174674232 |
| 16 | 2545094117389824 |
| 17 | 24014459778781840 |
| 18 | 209083911110141112 |