Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 1 1 vertically.

A207875

Number of nX4 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 0 and 1 1 1 vertically.

Terms

    a(0) =9a(1) =81a(2) =164a(3) =400a(4) =824a(5) =1940a(6) =4200a(7) =9276a(8) =21004a(9) =46026a(10) =102674a(11) =228630a(12) =506868a(13) =1128070a(14) =2505156a(15) =5569740a(16) =12380188a(17) =27502690a(18) =61145106a(19) =135886522a(20) =301975112a(21) =671190932a(22) =1491685306a(23) =3315241202a(24) =7368059728a(25) =16375432824a(26) =36394465410

External references