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 | 0 |
| 1 | 1 |
| 2 | 24 |
| 3 | 243 |
| 4 | 1728 |
| 5 | 10125 |
| 6 | 52488 |
| 7 | 250047 |
| 8 | 1119744 |
| 9 | 4782969 |
| 10 | 19683000 |
| 11 | 78594219 |
| 12 | 306110016 |
| 13 | 1167575877 |
| 14 | 4374822312 |
| 15 | 16142520375 |
| 16 | 58773123072 |
| 17 | 211488540273 |
| 18 | 753145430616 |
| 19 | 2657317134051 |
| 20 | 9298091736000 |
| 21 | 32291110337661 |