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 | 64 |
| 3 | 930 |
| 4 | 16780 |
| 5 | 356922 |
| 6 | 8681380 |
| 7 | 236739354 |
| 8 | 7135453180 |
| 9 | 235079261562 |
| 10 | 8389974421012 |
| 11 | 322019941283514 |
| 12 | 13211434169884204 |
| 13 | 576435716324437722 |
| 14 | 26631611751773999044 |
| 15 | 1297943388416061780186 |