Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero.
A230908
Number of nX6 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally 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) =272a(2) =2676a(3) =23614a(4) =219696a(5) =2121666a(6) =20713786a(7) =202875672a(8) =1989694528a(9) =19528076278a(10) =191729518620
External references
- oeis: A230908