The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 216 |
| 2 | 4992 |
| 3 | 115760 |
| 4 | 2708848 |
| 5 | 63632480 |
| 6 | 1498220176 |
| 7 | 35321033072 |
| 8 | 833329037376 |
| 9 | 19669285954672 |
| 10 | 464377424786608 |
| 11 | 10965243510496992 |
| 12 | 258942543673642320 |
| 13 | 6115202229118671536 |
| 14 | 144421327114372301632 |
| 15 | 3410825769986070048176 |
[216,4992,115760,2708848,63632480,1498220176, 35321033072,833329037376,19669285954672, 464377424786608,10965243510496992, 258942543673642320,6115202229118671536, 144421327114372301632,3410825769986070048176] |