The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 672 |
| 3 | 13440 |
| 4 | 443520 |
| 5 | 23950080 |
| 6 | 2107607040 |
| 7 | 301387806720 |
| 8 | 69921971159040 |
| 9 | 26290661155799040 |
| 10 | 16011012643881615360 |
| 11 | 15786858466867272744960 |
| 12 | 25195826113120167300956160 |
| 13 | 65080818850189392138369761280 |
[56,672,13440,443520,23950080,2107607040, 301387806720,69921971159040,26290661155799040, 16011012643881615360,15786858466867272744960, 25195826113120167300956160, 65080818850189392138369761280] |