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

A197469

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

Terms

    a(0) =1a(1) =2a(2) =6a(3) =12a(4) =24a(5) =50a(6) =98a(7) =194a(8) =394a(9) =786a(10) =1562a(11) =3138a(12) =6282a(13) =12530a(14) =25082a(15) =50210a(16) =100330a(17) =200658a(18) =401498a(19) =802818a(20) =1605450a(21) =3211442a(22) =6422714a(23) =12844514a(24) =25690282a(25) =51381138a(26) =102759194a(27) =205520322a(28) =411044874a(29) =822081650

External references