Number of inequivalent connected planar figures that can be formed from n non-overlapping 1 X 2 rectangles (or dominoes).

A056786

Number of inequivalent connected planar figures that can be formed from n non-overlapping 1 X 2 rectangles (or dominoes).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =26a(4) =255a(5) =2874a(6) =35520a(7) =454491a(8) =5954914a(9) =79238402a(10) =1067193518

External references