Number of nX3 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.
A205305
Number of nX3 0..3 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..3 introduced in row major order.
Terms
- a(0) =4a(1) =159a(2) =7445a(3) =381958a(4) =19490790a(5) =996536552a(6) =50933680120
External references
- oeis: A205305