Number of (n+2)X(1+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, vertically and ne-to-sw antidiagonally.

A255029

Number of (n+2)X(1+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, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =512a(1) =2554a(2) =10732a(3) =42890a(4) =154680a(5) =516998a(6) =1640073a(7) =5004712a(8) =14785630a(9) =42521002a(10) =119604304a(11) =330253684a(12) =897742410a(13) =2407927618a(14) =6384340078a(15) =16758261882a(16) =43604527938a(17) =112586027730a(18) =288720044562a(19) =735935809282

External references