Number of nX2 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203437
Number of nX2 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =8a(2) =64a(3) =372a(4) =2528a(5) =21988a(6) =186348a(7) =1484834a(8) =11983672a(9) =99287560a(10) =822775984a(11) =6775991390a(12) =55862871172a(13) =461924799782
External references
- oeis: A203437