Number of nX4 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
A207011
Number of nX4 0..2 arrays avoiding the patterns z z+1 z or z z-1 z in any row or column.
Terms
- a(0) =61a(1) =3721a(2) =130165a(3) =5174065a(4) =201211481a(5) =7825530345a(6) =303753655993
External references
- oeis: A207011