[1,1,4,30,340,5180,99360,2300830,62473600, 1946941920,68507714800,2686816932800, 116225776497600,5497681373384200, 282305750023897600,15640212734095950000, 929908726447266966400,59061538103044360083200, 3990922849835432102592000]