Number of 3 X n 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.
A231248
Number of 3 X n 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) =6a(2) =78a(3) =464a(4) =3090a(5) =22460a(6) =162766a(7) =1169472a(8) =8396770a(9) =60331460a(10) =433549110a(11) =3115381720a(12) =22385974490a(13) =160857679996
External references
- oeis: A231248