Number of ways to 4-color a 3 X n grid ignoring the variations of two colors.

A355882

Number of ways to 4-color a 3 X n grid ignoring the variations of two colors.

Terms

    a(0) =3a(1) =49a(2) =801a(3) =13095a(4) =214083a(5) =3499929a(6) =57218481a(7) =935434575a(8) =15292923363a(9) =250015887009

External references