Number of packing 1X1X2 bricks into 2X2Xn boxes considering packings obtained by rigid motions equivalent.

A387489

Number of packing 1X1X2 bricks into 2X2Xn boxes considering packings obtained by rigid motions equivalent.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =7a(4) =26a(5) =71a(6) =258a(7) =857a(8) =3148a(9) =11300a(10) =41841a(11) =154140a(12) =573201a(13) =2129726a(14) =7935779a(15) =29569762a(16) =110281431a(17) =411333271a(18) =1534676318a(19) =5726191937a(20) =21367848168a(21) =79738762725a(22) =297573920356

External references