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 | 30 |
| 2 | 625 |
| 3 | 11515 |
| 4 | 203889 |
| 5 | 3602088 |
| 6 | 64720340 |
| 7 | 1194928020 |
| 8 | 22800117076 |
| 9 | 450996059800 |
| 10 | 9262414989464 |
| 11 | 197632289814960 |
| 12 | 4381123888865424 |
| 13 | 100869322905986496 |
| 14 | 2410630110159777216 |
| 15 | 59757230054773959552 |
| 16 | 1535299458203884231296 |
| 17 | 40848249256425236795904 |