Number of (4+1) X (n+1) 0..3 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
A235821
Number of (4+1) X (n+1) 0..3 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
Terms
- a(0) =268448a(1) =52510194a(2) =9225012664
External references
- oeis: A235821