Number of n X 3 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.
A231058
Number of n X 3 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =6a(2) =34a(3) =208a(4) =1272a(5) =7818a(6) =47998a(7) =294832a(8) =1810916a(9) =11123242a(10) =68322370a(11) =419657160a(12) =2577663664a(13) =15832804586a(14) =97249963694a(15) =597339237368
External references
- oeis: A231058