Number of nX7 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order.
A204300
Number of nX7 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order.
Terms
- a(0) =0a(1) =776a(2) =164112a(3) =38262132a(4) =17549848472
External references
- oeis: A204300