Triangular array read by rows. T(n,k) is the number of connected endofunctions on {1,2,...,n} that have exactly k nodes in the unique cycle of its digraph representation.
A201685
Triangular array read by rows. T(n,k) is the number of connected endofunctions on {1,2,...,n} that have exactly k nodes in the unique cycle of its digraph representation.
Terms
- a(0) =1a(1) =2a(2) =1a(3) =9a(4) =6a(5) =2a(6) =64a(7) =48a(8) =24a(9) =6a(10) =625a(11) =500a(12) =300a(13) =120a(14) =24a(15) =7776a(16) =6480a(17) =4320a(18) =2160a(19) =720a(20) =120a(21) =117649a(22) =100842a(23) =72030a(24) =41160a(25) =17640a(26) =5040a(27) =720a(28) =2097152a(29) =1835008
External references
- oeis: A201685