Number of connected ordered 5-element T_0-antichains on an unlabeled n-set.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =30a(5) =1945a(6) =41901a(7) =410505a(8) =2363160a(9) =9266220a(10) =27058460a(11) =62261590a(12) =117178540a(13) =185037520a(14) =249548910a(15) =290969170a(16) =295695540a(17) =263173865a(18) =205581235a(19) =140943485a(20) =84636895a(21) =44347105a(22) =20159615a(23) =7888705a(24) =2629575a(25) =736281a(26) =169911a(27) =31465a(28) =4495a(29) =465