Number of nX3 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
A207530
Number of nX3 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
Terms
- a(0) =58a(1) =3364a(2) =147006a(3) =6758694a(4) =308746116a(5) =14111752738a(6) =644774919410
External references
- oeis: A207530