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

A208684

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

Terms

    a(0) =10a(1) =100a(2) =282a(3) =927a(4) =3430a(5) =11067a(6) =34627a(7) =111642a(8) =356116a(9) =1121500a(10) =3542847a(11) =11196360a(12) =35283685a(13) =111150345a(14) =350234962a(15) =1103073000a(16) =3473204686a(17) =10936009567a(18) =34431544350a(19) =108396961047a(20) =341246282767

External references