Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

A222652

Number of nX3 0..3 arrays with no more than floor(nX3/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

Terms

    a(0) =2a(1) =60a(2) =1229a(3) =61757a(4) =1073368a(5) =58834301a(6) =1009942505a(7) =57422493141a(8) =983799180734

External references