Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4.

A197883

Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4.

Terms

    a(0) =0a(1) =4a(2) =3a(3) =14a(4) =18a(5) =43a(6) =78a(7) =154a(8) =305a(9) =572a(10) =1178a(11) =2185a(12) =4440a(13) =8408a(14) =16795a(15) =32212a(16) =63608a(17) =123295a(18) =241494a(19) =470486a(20) =918795a(21) =1793434a(22) =3497978a(23) =6831997a(24) =13324168a(25) =26019470a(26) =50755921a(27) =99095168a(28) =193344576a(29) =377408195

External references