Number of nX4 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order.
A206646
Number of nX4 0..2 arrays with no occurrence of three equal elements in a row horizontally or vertically, and new values 0..2 introduced in row major order.
Terms
- a(0) =11a(1) =726a(2) =30145a(3) =1414023a(4) =64166392a(5) =2937839117a(6) =134185561617
External references
- oeis: A206646