Number of nX4 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
A230610
Number of nX4 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero.
Terms
- a(0) =0a(1) =2a(2) =30a(3) =348a(4) =3956a(5) =44916a(6) =509978a(7) =5790456a(8) =65747178a(9) =746521190a(10) =8476319172a(11) =96243740012
External references
- oeis: A230610