Number of n X 1 0..3 arrays with every repeated value in every row and column greater than the previous repeated value.

A267928

Number of n X 1 0..3 arrays with every repeated value in every row and column greater than the previous repeated value.

Terms

    a(0) =4a(1) =16a(2) =60a(3) =222a(4) =804a(5) =2872a(6) =10132a(7) =35383a(8) =122480a(9) =420752a(10) =1435736a(11) =4870132a(12) =16432216a(13) =55178416a(14) =184481816a(15) =614348813a(16) =2038435340a(17) =6740997616a(18) =22223182372a(19) =73053304378a(20) =239502956924a(21) =783241953896

External references