Number of fixed 3D piled polyominoes: polycubes with fixed orientation, with no cubes "sitting on air".

A113174

Number of fixed 3D piled polyominoes: polycubes with fixed orientation, with no cubes "sitting on air".

Terms

    a(0) =1a(1) =3a(2) =11a(3) =44a(4) =184a(5) =792a(6) =3484a(7) =15592a(8) =70745a(9) =324561a(10) =1502511a(11) =7007929a(12) =32892778a(13) =155221536a(14) =735915652a(15) =3503270920a(16) =16737092549a(17) =80218277681a(18) =385574074383

External references