Number of n X 2 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
A202883
Number of n X 2 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.
Terms
- a(0) =3a(1) =35a(2) =265a(3) =1849a(4) =13345a(5) =96941a(6) =701275a(7) =5071167a(8) =36689027a(9) =265439091a(10) =1920308033a(11) =13892446697a(12) =100505282121a(13) =727107537885
External references
- oeis: A202883