T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally and vertically.
A253820
T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally and vertically.
Terms
- a(0) =512a(1) =2700a(2) =2700a(3) =12680a(4) =12992a(5) =12680a(6) =47816a(7) =60392a(8) =60392a(9) =47816a(10) =178752a(11) =181070a(12) =214596a(13) =181070a(14) =178752a(15) =618856a(16) =651937a(17) =554638a(18) =554638a(19) =651937a(20) =618856a(21) =2201616a(22) =2008068a(23) =1826190a(24) =1713952a(25) =1826190a(26) =2008068a(27) =2201616a(28) =7686444a(29) =7125170
External references
- oeis: A253820