[1,1,2,7,21,66,228,799,2843,10357,38278,143012, 539980,2056848,7892496,30483351,118416903, 462348219,1813410078,7141608015,28229040165, 111956307486,445374729396,1776704142348, 7105896093588,28487216564476,114454156300136, 460781265916312]