Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 1 2 7 8 or 9.

A252587

Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 1 2 7 8 or 9.

Terms

    a(0) =13170a(1) =139918a(2) =1741670a(3) =22094800a(4) =278456362a(5) =3517561890a(6) =44483332378a(7) =562542584596

External references