Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

A231296

Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Terms

    a(0) =2a(1) =5a(2) =16a(3) =51a(4) =174a(5) =617a(6) =2223a(7) =8051a(8) =29220a(9) =106109a(10) =385468a(11) =1400401a(12) =5088037a(13) =18486201a(14) =67166528a(15) =244037407a(16) =886670130a(17) =3221565113a(18) =11705027203a(19) =42528259303a(20) =154519400012a(21) =561420537017

External references