[1,2,6,18,54,162,486,1458,4374,13122,38854,115027, 342013,1017864,3029092,9013876,26821828,79807684, 237456052,706492756,2101954468,6253701604, 18606251668,55358626421,164706941845,490047239090, 1458020343786]