Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A222880
Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =5a(1) =131a(2) =6282a(3) =409775a(4) =19707855a(5) =1340197778a(6) =66248732403
External references
- oeis: A222880