Number of n X n 0..2n-2 arrays with upper left zero and lower right 2n-2 and each element differing from its horizontal and vertical neighbors by one or two.
A265439
Number of n X n 0..2n-2 arrays with upper left zero and lower right 2n-2 and each element differing from its horizontal and vertical neighbors by one or two.
Terms
- a(0) =1a(1) =1a(2) =145a(3) =57721a(4) =41855199a(5) =569620472894
External references
- oeis: A265439