Number of (n+1)X(3+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235558
Number of (n+1)X(3+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =23024a(1) =2481481a(2) =269127070a(3) =24006644081
External references
- oeis: A235558