Triangle read by rows: T(n,k) is the number of unlabeled connected weakly graded (ranked) posets with n elements and rank k.

A361954

Triangle read by rows: T(n,k) is the number of unlabeled connected weakly graded (ranked) posets with n elements and rank k.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =4a(8) =5a(9) =1a(10) =0a(11) =10a(12) =23a(13) =8a(14) =1a(15) =0a(16) =27a(17) =107a(18) =56a(19) =11a(20) =1a(21) =0a(22) =88a(23) =557a(24) =388a(25) =98a(26) =14a(27) =1a(28) =0a(29) =328

External references