T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
A235742
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
Terms
- a(0) =81a(1) =576a(2) =576a(3) =3992a(4) =9710a(5) =3992a(6) =26088a(7) =160075a(8) =160075a(9) =26088a(10) =167892a(11) =2423417a(12) =6175786a(13) =2423417a(14) =167892a(15) =1060410a(16) =36199157a(17) =216691834a(18) =216691834a(19) =36199157a(20) =1060410a(21) =6648825a(22) =523547651a(23) =7433913626a(24) =17653658980a(25) =7433913626a(26) =523547651
External references
- oeis: A235742