Number of (n+2)X(3+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

A231222

Number of (n+2)X(3+2) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.

Terms

    a(0) =3a(1) =8a(2) =21a(3) =54a(4) =185a(5) =552a(6) =1799a(7) =5900a(8) =19185a(9) =63834a(10) =210899a(11) =701724a(12) =2336721a(13) =7786742a(14) =25984043a(15) =86721124a(16) =289569291a(17) =967130226a(18) =3230474181a(19) =10792263708a(20) =36056118433a(21) =120467821634a(22) =402509354825

External references