T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

A278896

T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =161a(8) =161a(9) =1a(10) =56a(11) =12392a(12) =52424a(13) =12392a(14) =56a(15) =728a(16) =389640a(17) =6888340a(18) =6888340a(19) =389640a(20) =728a(21) =5328a(22) =7709668a(23) =518626568a(24) =2058210408a(25) =518626568a(26) =7709668a(27) =5328a(28) =27876a(29) =112188011

External references