[1,4,18,82,378,1760,8262,39044,185526,885596,4243590,20400954,98353278,475322352,2302064010,11170370850,54293503770,264290420540,1288257980310,6287181414470,30717958762350,150234512678480,735446569221810,3603330368706640,17668505697688098,86698739895529300]
|