Triangular array read by rows: T(n,k) is the number of transitive relations on n labeled nodes with exactly k connected components.
A343882
Triangular array read by rows: T(n,k) is the number of transitive relations on n labeled nodes with exactly k connected components.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =0a(4) =9a(5) =4a(6) =0a(7) =109a(8) =54a(9) =8a(10) =0a(11) =2647a(12) =1115a(13) =216a(14) =16a(15) =0a(16) =110481a(17) =36280a(18) =6790a(19) =720a(20) =32a(21) =0a(22) =7291543a(23) =1801927a(24) =287475a(25) =32020a(26) =2160a(27) =64a(28) =0a(29) =726434549
External references
- oeis: A343882