Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A222686
Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =3a(1) =18a(2) =220a(3) =3189a(4) =47696a(5) =723244a(6) =11082863a(7) =171281610a(8) =2665243912a(9) =41702927217a(10) =655500979620
External references
- oeis: A222686