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

A251912

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

Terms

    a(0) =49436a(1) =950384a(2) =950384a(3) =18245824a(4) =34096384a(5) =18245824a(6) =351040004a(7) =1228480800a(8) =1228480800a(9) =351040004a(10) =6755376172a(11) =44527823912a(12) =83861378128a(13) =44527823912a(14) =6755376172a(15) =130017259448

External references