[1,2,4,10,28,136,726,5100,40362,363288,3628810,39921044,479001612,6227066928,87178295296,1307675013928,20922789888016,355687438476444,6402373705728018,121645100594641896,2432902008177690360,51090942175425331320,1124000727777607680022]
