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

A197311

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

Terms

    a(0) =1a(1) =0a(2) =3a(3) =2a(4) =9a(5) =6a(6) =27a(7) =18a(8) =83a(9) =56a(10) =257a(11) =176a(12) =797a(13) =556a(14) =2475a(15) =1766a(16) =7699a(17) =5640a(18) =23995a(19) =18106a(20) =74937a(21) =58408a(22) =234541a(23) =189266a(24) =735771a(25) =615834a(26) =2313757a(27) =2011340a(28) =7294375a(29) =6591454

External references