Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
A197644
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =31a(2) =342a(3) =2910a(4) =25273a(5) =251972a(6) =2579814a(7) =24550379a(8) =230860577a(9) =2228487362a(10) =21701017288a(11) =209232791158
External references
- oeis: A197644