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

A278553

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

Terms

    a(0) =0a(1) =0a(2) =0a(3) =4a(4) =70a(5) =4a(6) =65a(7) =1531a(8) =1531a(9) =65a(10) =456a(11) =25402a(12) =124564a(13) =25402a(14) =456a(15) =2128a(16) =385040a(17) =6207774a(18) =6207774a(19) =385040a(20) =2128a(21) =7728a(22) =4880813a(23) =256173362a(24) =1116456061a(25) =256173362a(26) =4880813a(27) =7728a(28) =23607a(29) =50476458

External references