[1,3,6,18,57,195,684,2460,8970,33102,123204,461868,1741410,6597750,25099584,95822928,366943881,1408947675,5422742910,20915079258,80820382425,312839889219,1212812010804,4708415402772,18302630040504,71230126892088,277514015733168]