Number of 3-dimensional polyominoes (or polycubes) with n cells and rotational symmetry group of order exactly 2.

A066454

Number of 3-dimensional polyominoes (or polycubes) with n cells and rotational symmetry group of order exactly 2.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =4a(4) =10a(5) =34a(6) =71a(7) =246a(8) =522a(9) =1783a(10) =3765a(11) =12858a(12) =27496a(13) =94525a(14) =203318a(15) =702789a(16) =1522315a(17) =5290592a(18) =11519095a(19) =40214441a(20) =87947507a(21) =308236670

External references