T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
A253533
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock antidiagonal maximum minus diagonal minimum nondecreasing horizontally and diagonal maximum minus antidiagonal minimum nondecreasing vertically.
Terms
- a(0) =81a(1) =459a(2) =459a(3) =1963a(4) =2722a(5) =1963a(6) =7253a(7) =9255a(8) =9255a(9) =7253a(10) =25165a(11) =27070a(12) =22418a(13) =27070a(14) =25165a(15) =85663a(16) =71333a(17) =62237a(18) =62237a(19) =71333a(20) =85663a(21) =291511a(22) =176266a(23) =142679a(24) =182493a(25) =142679a(26) =176266a(27) =291511a(28) =997121a(29) =416901
External references
- oeis: A253533