Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

A223128

Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Terms

    a(0) =5a(1) =72a(2) =1154a(3) =28907a(4) =444555a(5) =11814919a(6) =186184618a(7) =5048458186a(8) =80664693231

External references