Number of (n+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.

A258999

Number of (n+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) =512a(1) =6271a(2) =55760a(3) =225215a(4) =219424a(5) =292814a(6) =73734a(7) =112980a(8) =204210a(9) =373950a(10) =691648a(11) =1293909a(12) =2450704a(13) =4696800a(14) =9101720a(15) =17813333a(16) =35142090a(17) =69765156a(18) =139164158a(19) =278562651a(20) =558960096a(21) =1123499142a(22) =2260769566a(23) =4552609547a(24) =9172064656

External references