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) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 36 |
| 3 | 216 |
| 4 | 1260 |
| 5 | 7206 |
| 6 | 40650 |
| 7 | 227256 |
| 8 | 1262832 |
| 9 | 6983730 |
| 10 | 38470224 |
| 11 | 211220814 |
| 12 | 1156489782 |
| 13 | 6317095284 |
| 14 | 34435495872 |
| 15 | 187380150468 |
| 16 | 1018035642054 |