Number of nX3 0..n+3-2 arrays with upper left zero and lower right n+3-2 and each element differing from its horizontal and vertical neighbors by one or two.
A265442
Number of nX3 0..n+3-2 arrays with upper left zero and lower right n+3-2 and each element differing from its horizontal and vertical neighbors by one or two.
Terms
- a(0) =1a(1) =2a(2) =145a(3) =2825a(4) =25069a(5) =174794a(6) =2345091a(7) =44474575a(8) =628376593a(9) =6864539181a(10) =75699824370
External references
- oeis: A265442