Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,1,1 for x=0,1,2,3,4.
A197609
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,1,1,1 for x=0,1,2,3,4.
Terms
- a(0) =3a(1) =43a(2) =366a(3) =3569a(4) =33484a(5) =305072a(6) =2851047a(7) =26590627a(8) =247746587a(9) =2305802120a(10) =21459906149a(11) =199841921634
External references
- oeis: A197609