Triangle read by rows: T(n,k) is the number of endofunctions on [n] where the difference between the smallest and largest values in the image of the function is k, 0 <= k < n.
A391488
Triangle read by rows: T(n,k) is the number of endofunctions on [n] where the difference between the smallest and largest values in the image of the function is k, 0 <= k < n.
Terms
- a(0) =1a(1) =2a(2) =2a(3) =3a(4) =12a(5) =12a(6) =4a(7) =42a(8) =100a(9) =110a(10) =5a(11) =120a(12) =540a(13) =1140a(14) =1320a(15) =6a(16) =310a(17) =2408a(18) =8106a(19) =16324a(20) =19502a(21) =7a(22) =756a(23) =9660a(24) =48552a(25) =142632a(26) =280140a(27) =341796a(28) =8a(29) =1778
External references
- oeis: A391488