T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.

A256954

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically.

Terms

    a(0) =512a(1) =2554a(2) =2554a(3) =10732a(4) =13349a(5) =10732a(6) =42890a(7) =66542a(8) =66542a(9) =42890a(10) =154680a(11) =262251a(12) =319819a(13) =262251a(14) =154680a(15) =516998a(16) =844499a(17) =1015815a(18) =1015815a(19) =844499a(20) =516998a(21) =1640073a(22) =2396710a(23) =2663867a(24) =2782301a(25) =2663867a(26) =2396710a(27) =1640073a(28) =5004712a(29) =6268245

External references