Number of (n+2)X3 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order.

A204049

Number of (n+2)X3 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order.

Terms

    a(0) =1379a(1) =10447a(2) =80391a(3) =622031a(4) =4823759a(5) =37451727a(6) =290942303a(7) =2260735279a(8) =17568741535a(9) =136538226767

External references