T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.

A252352

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8.

Terms

    a(0) =562a(1) =798a(2) =798a(3) =1331a(4) =1386a(5) =1331a(6) =2176a(7) =2864a(8) =2864a(9) =2176a(10) =4013a(11) =5641a(12) =6986a(13) =5641a(14) =4013a(15) =7109a(16) =12419a(17) =15208a(18) =15208a(19) =12419a(20) =7109a(21) =12670a(22) =29159a(23) =42345a(24) =40756a(25) =42345a(26) =29159a(27) =12670a(28) =23051a(29) =66229

External references