Number of (n+1)X6 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186478

Number of (n+1)X6 0..3 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =4895a(1) =3442a(2) =20224a(3) =25633a(4) =107353a(5) =108025a(6) =433513a(7) =479785a(8) =1793817a(9) =2226665a(10) =7478693a(11) =10225073a(12) =31371137a(13) =46298817a(14) =132181633a(15) =207648469a(16) =559418905a(17) =924724441a(18) =2376589225a(19) =4095459817a(20) =10129319461a(21) =18060113137a(22) =43291468321

External references