Number of polycubes of size n and symmetry class D.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =1a(7) =0a(8) =1a(9) =9a(10) =1a(11) =7a(12) =68a(13) =9a(14) =61a(15) =473a(16) =81a(17) =440a(18) =3316a(19) =614a(20) =3315a(21) =23537a(22) =4613a(23) =24419a(24) =169404a(25) =34247a(26) =182074a(27) =1236200a(28) =255636a(29) =1363691