Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
A206953
Number of nX4 0..2 arrays avoiding the pattern z z+1 z in any row, column or nw-to-se diagonal.
Terms
- a(0) =69a(1) =4761a(2) =218637a(3) =9803278a(4) =449797912a(5) =20694430627a(6) =950821989599
External references
- oeis: A206953