Number of nX3 0..2 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..2 introduced in row major order.

A241109

Number of nX3 0..2 arrays with no element equal to exactly three horizontal or vertical neighbors, with new values 0..2 introduced in row major order.

Terms

    a(0) =5a(1) =113a(2) =2612a(3) =60340a(4) =1394492a(5) =32228144a(6) =744822776a(7) =17213554688a(8) =397821442776

External references