Number of polycubes of size n and symmetry class CE.

Terms

a(0) =0a(1) =0a(2) =1a(3) =0a(4) =3a(5) =4a(6) =12a(7) =13a(8) =48a(9) =61a(10) =186a(11) =231a(12) =727a(13) =941a(14) =2855a(15) =3707a(16) =11293a(17) =14909a(18) =44955a(19) =59760a(20) =180092a(21) =241827