OFFSET
1,4
COMMENTS
The sequence counts "one-sided" polycubes (A000162); chiral polycubes count twice. - John Mason, Sep 18 2024
REFERENCES
W. F. Lunnon, Symmetry of cubical and general polyominoes, pp. 101-108 of R. C. Read, editor, Graph Theory and Computing. Academic Press, NY, 1972.
FORMULA
a(n) = 2*B(n)+2*C(n)+J(n)+BE(n)+BF(n)+CE(n)+CK(n)+EE(n), see Lunnon paper for naming convention. - John Mason, Sep 18 2024
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Brendan Owen (brendan_owen(AT)yahoo.com), Dec 27 2001
EXTENSIONS
Name clarified and more terms from John Mason, Sep 18 2024
STATUS
approved