Number of (2+1)X(n+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
A236491
Number of (2+1)X(n+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing columnwise and nonincreasing rowwise.
Terms
- a(0) =583a(1) =9839a(2) =156087a(3) =2339313a(4) =34149421a(5) =489696691a(6) =6952708569a(7) =98111759309
External references
- oeis: A236491