T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

A223104

T(n,k)=Number of nXk 0..2 arrays with exactly floor(nXk/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Terms

    a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =0a(6) =6a(7) =24a(8) =16a(9) =0a(10) =16a(11) =225a(12) =546a(13) =280a(14) =0a(15) =16a(16) =1456a(17) =12330a(18) =13416a(19) =1440a(20) =0a(21) =40a(22) =11874a(23) =198848a(24) =737254a(25) =255216a(26) =16352a(27) =0a(28) =280a(29) =86726

External references