Number of (n+2)X3 0..3 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

A187354

Number of (n+2)X3 0..3 arrays with every 2X2 subblock sum equal to some diagonal or antidiagonal neighbor 2X2 subblock sum.

Terms

    a(0) =5056a(1) =7776a(2) =440192a(3) =2332924a(4) =52776112a(5) =460096436a(6) =7500948108a(7) =81056245820

External references