Number of n X 4 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
A203439
Number of n X 4 0..7 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
Terms
- a(0) =1a(1) =372a(2) =142108a(3) =24278164a(4) =3216740482a(5) =482229769194
External references
- oeis: A203439