Number of nX4 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203334
Number of nX4 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =161a(2) =27056a(3) =2224079a(4) =156011082a(5) =12492984999
External references
- oeis: A203334