T(n,k) is the number of connected unlabeled posets with n elements and rank k: triangle read by rows.
A342500
T(n,k) is the number of connected unlabeled posets with n elements and rank k: triangle read by rows.
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) =24a(13) =9a(14) =1a(15) =0a(16) =27a(17) =123a(18) =73a(19) =14a(20) =1a(21) =0a(22) =88a(23) =734a(24) =638a(25) =169a(26) =20a(27) =1a(28) =0a(29) =328
External references
- oeis: A342500