Number of polycubes of size n and symmetry class BE.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =5a(6) =5a(7) =21a(8) =26a(9) =93a(10) =116a(11) =392a(12) =497a(13) =1616a(14) =2087a(15) =6690a(16) =8656a(17) =27493a(18) =35797a(19) =113728a(20) =147838a(21) =469824a(22) =611551a(23) =1951237