Number of 3 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
A231039
Number of 3 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =2a(2) =10a(3) =72a(4) =736a(5) =9726a(6) =96882a(7) =1194032a(8) =13187232a(9) =153259946a(10) =1737128710a(11) =19948288212a(12) =227507930240
External references
- oeis: A231039