Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
A223054
Number of 3Xn 0..3 arrays with exactly floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.
Terms
- a(0) =0a(1) =32a(2) =1682a(3) =95648a(4) =3760845a(5) =225200914a(6) =8981996365a(7) =555681741893
External references
- oeis: A223054