Number of 3Xn arrays containing n copies of 0..3-1 with no element plus any diagonal or antidiagonal neighbor equal to 3-1.

A266184

Number of 3Xn arrays containing n copies of 0..3-1 with no element plus any diagonal or antidiagonal neighbor equal to 3-1.

Terms

    a(0) =6a(1) =22a(2) =88a(3) =296a(4) =1372a(5) =6128a(6) =29552a(7) =147570a(8) =755512a(9) =3945876a(10) =21025260a(11) =113229974a(12) =617874744a(13) =3397997370a(14) =18844357820a(15) =105109392654a(16) =589660050052

External references