Number of 2nX6 0..3 arrays with values 0..3 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors.
A198207
Number of 2nX6 0..3 arrays with values 0..3 introduced in row major order and each element unequal to exactly two horizontal and vertical neighbors.
Terms
- a(0) =658a(1) =50729a(2) =3603458a(3) =276030525a(4) =21989253467
External references
- oeis: A198207