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 | 0 |
| 2 | 0 |
| 3 | 36 |
| 4 | 864 |
| 5 | 17500 |
| 6 | 351000 |
| 7 | 7197169 |
| 8 | 151633440 |
| 9 | 3275925804 |
| 10 | 72315234000 |
| 11 | 1625547144199 |
| 12 | 37102497859152 |
| 13 | 857909644412275 |
| 14 | 20059247889751161 |
| 15 | 473562712831103536 |
| 16 | 11274693857547716640 |
| 17 | 270435401233629732940 |