[1,2,6,18,56,170,492,1358,3600,9234,23060,56342, 135192,319514,745500,1720350,3932192,8912930, 20054052,44826662,99614760,220201002,484442156, 1061158958,2315255856,5033164850,10905190452, 23555211318,50734301240,108984795194]