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

A259007

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

Terms

    a(0) =2444a(1) =6271a(2) =18341a(3) =50654a(4) =131557a(5) =317141a(6) =701282a(7) =1467387a(8) =2896645a(9) =5442921a(10) =9816954a(11) =17096392a(12) =28757926a(13) =47075958a(14) =75218973a(15) =117547715a(16) =179888422a(17) =270566220a(18) =400421776a(19) =584035872a(20) =840159021a(21) =1193892062a(22) =1677629192

External references