Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,3,4,0 for x=0,1,2,3,4.
A196953
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,3,4,0 for x=0,1,2,3,4.
Terms
- a(0) =4a(1) =20a(2) =87a(3) =492a(4) =2687a(5) =14509a(6) =78717a(7) =427700a(8) =2320738a(9) =12593583a(10) =68356288a(11) =370995901a(12) =2013496775a(13) =10928042781a(14) =59310677884a(15) =321900611044
External references
- oeis: A196953