Number of (n+1)X2 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

A203927

Number of (n+1)X2 0..5 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.

Terms

    a(0) =396a(1) =4356a(2) =47916a(3) =527076a(4) =5797836a(5) =63776196a(6) =701538156a(7) =7716919716a(8) =84886116876a(9) =933747285636

External references