T(n,k)=Number of nXk 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it.

A209047

T(n,k)=Number of nXk 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it.

Terms

    a(0) =4a(1) =12a(2) =12a(3) =36a(4) =124a(5) =36a(6) =108a(7) =1300a(8) =1300a(9) =108a(10) =324a(11) =13644a(12) =47700a(13) =13644a(14) =324a(15) =972a(16) =143212a(17) =1752148a(18) =1752148a(19) =143212a(20) =972a(21) =2916a(22) =1503212a(23) =64369764a(24) =225262148a(25) =64369764a(26) =1503212a(27) =2916a(28) =8748a(29) =15778340

External references