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REFERENCES
| G. Aleksandrowicz and G. Barequet, Counting d-dimensional polycubes and nonrectangular planar polyominoes, Int. J. of Computational Geometry and Applications, 19 (2009), 215-229.
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.
S. Luther and S. Mertens, Counting lattice animals in high dimensions, http://arxiv.org/abs/1106.1078
S. Luther and S. Mertens, Counting lattice animals in high dimensions, Journal of Statistical Mechanics: Theory and Experiment, 2011 (9), 546-565.
D. H. Redelmeier, personal communication (with N. J. A. Sloane).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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EXTENSIONS
| Edited by Arun Giridhar (agiridha(AT)ecn.purdue.edu), Feb 14 2011
a(17) from Achim Flammenkamp (achim(AT)uni-bielefeld.de) Feb 15 1999.
a(18) from the Aleksandrowicz and Barequet paper (N. J. A. Sloane, Jul 09 2009)
a(19) from Luther and Mertens by Gill Barequet (barequet(AT)cs.technion.ac.il), Jun 12 2011
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