Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having sum 9.

A187639

Number of (n+2)X(n+2) 0..2 arrays with each 3X3 subblock having sum 9.

Terms

    a(0) =3139a(1) =79259a(2) =1342083a(3) =17048731a(4) =234213387

External references