Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222874
Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =11a(1) =1814a(2) =409775a(3) =95867967a(4) =22794825314
External references
- oeis: A222874