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 1 3 6 or 8.

A252628

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 1 3 6 or 8.

Terms

    a(0) =4508a(1) =17704a(2) =17704a(3) =81098a(4) =78710a(5) =81098a(6) =405044a(7) =585774a(8) =585774a(9) =405044a(10) =2130874a(11) =5013608a(12) =8098018a(13) =5013608a(14) =2130874a(15) =11518022a(16) =45094726a(17) =118551272a(18) =118551272a(19) =45094726a(20) =11518022a(21) =63438930a(22) =410194726a(23) =1793890764a(24) =2894745288a(25) =1793890764

External references