T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.

A252278

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 2 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 2 3 4 6 or 7.

Terms

    a(0) =206a(1) =185a(2) =185a(3) =232a(4) =300a(5) =232a(6) =322a(7) =588a(8) =588a(9) =322a(10) =535a(11) =948a(12) =1407a(13) =948a(14) =535a(15) =852a(16) =2154a(17) =2513a(18) =2513a(19) =2154a(20) =852a(21) =1260a(22) =4702a(23) =7803a(24) =4895a(25) =7803a(26) =4702a(27) =1260a(28) =2221a(29) =7922

External references