Number of nX4 0..2 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..2 order.
A223122
Number of nX4 0..2 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..2 order.
Terms
- a(0) =10a(1) =489a(2) =28907a(3) =1780641a(4) =112106293a(5) =7157970340a(6) =461597847603
External references
- oeis: A223122