Number of (n+2) X 4 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.

A186561

Number of (n+2) X 4 0..2 arrays with every 3 X 3 subblock commuting with each horizontal and vertical neighbor 3 X 3 subblock.

Terms

    a(0) =721a(1) =173a(2) =401a(3) =1411a(4) =2617a(5) =3379a(6) =4033a(7) =4795a(8) =6361a(9) =10443a(10) =17153a(11) =26995a(12) =43177a(13) =66139a(14) =98497a(15) =151699a(16) =231881a(17) =350539a(18) =543249a(19) =835843a(20) =1270105a(21) =1958875a(22) =3007777a(23) =4577331a(24) =7041321a(25) =10810763a(26) =16490033a(27) =25335715a(28) =38890105a(29) =59403259

External references