Number of polycubes of size n and symmetry class B.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =3a(6) =4a(7) =37a(8) =52a(9) =342a(10) =502a(11) =2836a(12) =4343a(13) =22622a(14) =35405a(15) =176176a(16) =281141a(17) =1363112a(18) =2205171a(19) =10527712a(20) =17221126a(21) =81462884a(22) =134424679a(23) =632308448