Number of n X 3 0..3 arrays x(i,j) with each element horizontally, diagonally 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.
A231241
Number of n X 3 0..3 arrays x(i,j) with each element horizontally, diagonally 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) =14a(2) =78a(3) =552a(4) =3820a(5) =26658a(6) =185074a(7) =1287036a(8) =8947088a(9) =62202118a(10) =432432502a(11) =3006318960a(12) =20900215412a(13) =145300370954
External references
- oeis: A231241