Number of n X 4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.
A207475
Number of n X 4 0..3 arrays avoiding the patterns z z+1 z or z z-1 z in any row, column or nw-se diagonal.
Terms
- a(0) =214a(1) =45796a(2) =5632964a(3) =768149650a(4) =103954441786
External references
- oeis: A207475