[0,1,3,6,15,41,108,281,735,1926,5043,13201,34560, 90481,236883,620166,1623615,4250681,11128428, 29134601,76275375,199691526,522799203,1368706081, 3583319040,9381251041,24560434083,64300051206, 168339719535,440719107401,1153817602668]