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

A254819

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

Terms

    a(0) =512a(1) =2703a(2) =2703a(3) =12730a(4) =15848a(5) =12730a(6) =55904a(7) =95110a(8) =95110a(9) =55904a(10) =221858a(11) =522294a(12) =748444a(13) =522294a(14) =221858a(15) =833037a(16) =2691838a(17) =5525547a(18) =5525547a(19) =2691838a(20) =833037a(21) =2977462a(22) =13380696a(23) =37573674a(24) =52855290a(25) =37573674a(26) =13380696a(27) =2977462a(28) =10225464

External references