[1,5,20,105,520,2580,12945,64680,323320,1616780,
8083745,40418380,202092620,1010462480,5052310420,
25261556205,126307777920,631538879180,
3157694416720,15788472066780,78942360284720,
394711801527505,1973559007551520,9867795037511480,
49338975188073020]
|