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

A256904

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

Terms

    a(0) =512a(1) =2444a(2) =2444a(3) =9374a(4) =9072a(5) =9374a(6) =34698a(7) =38540a(8) =38540a(9) =34698a(10) =113474a(11) =137381a(12) =202462a(13) =137381a(14) =113474a(15) =330684a(16) =396712a(17) =721051a(18) =721051a(19) =396712a(20) =330684a(21) =914320a(22) =1041135a(23) =1948416a(24) =2212280a(25) =1948416a(26) =1041135a(27) =914320a(28) =2433544a(29) =2401667

External references