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 3 4 5 or 6.

A251836

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 3 4 5 or 6.

Terms

    a(0) =678a(1) =3354a(2) =3354a(3) =18124a(4) =27554a(5) =18124a(6) =97316a(7) =262404a(8) =262404a(9) =97316a(10) =518514a(11) =2298772a(12) =4182084a(13) =2298772a(14) =518514a(15) =2764828a(16) =20314774a(17) =60982362a(18) =60982362a(19) =20314774a(20) =2764828a(21) =14778068a(22) =182241310a(23) =909331750a(24) =1464435968a(25) =909331750

External references