Number of n X 4 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,1,0,1 for x=0,1,2,3,4.
A197369
Number of n X 4 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,4,1,0,1 for x=0,1,2,3,4.
Terms
- a(0) =1a(1) =7a(2) =45a(3) =161a(4) =899a(5) =4023a(6) =19387a(7) =92169a(8) =436539a(9) =2077281a(10) =9861263a(11) =46848707a(12) =222547181a(13) =1057107041a(14) =5021579939a(15) =23853406065a(16) =113308835575a(17) =538241104209
External references
- oeis: A197369