Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.
A197471
Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =12a(2) =46a(3) =184a(4) =748a(5) =2824a(6) =10934a(7) =42474a(8) =164782a(9) =638460a(10) =2473902a(11) =9589038a(12) =37167908a(13) =144059050a(14) =558354234a(15) =2164121964a(16) =8387927204a(17) =32510787510a(18) =126008566828a(19) =488396574430
External references
- oeis: A197471