Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235839
Number of (n+1)X(2+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =487a(1) =6921a(2) =86509a(3) =919222a(4) =8638740a(5) =73276865a(6) =573836909a(7) =4209526173a(8) =29315012106a(9) =195567636675
External references
- oeis: A235839