T(n,k) is the number of n X k 1..(max n,k) arrays with each row and column having unrepeated values.

A221438

T(n,k) is the number of n X k 1..(max n,k) arrays with each row and column having unrepeated values.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =6a(4) =2a(5) =6a(6) =24a(7) =12a(8) =12a(9) =24a(10) =120a(11) =216a(12) =12a(13) =216a(14) =120a(15) =720a(16) =5280a(17) =576a(18) =576a(19) =5280a(20) =720a(21) =5040a(22) =190800a(23) =66240a(24) =576a(25) =66240a(26) =190800a(27) =5040a(28) =40320a(29) =9344160

External references