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A056846
Number of polyominoids containing n squares: these are 2-dimensional polyominoes in a three-dimensional grid (edge-connected squares, like the floors, ceilings and walls of a building). Mirror images are distinguished.
3
1, 2, 11, 80, 780, 8781, 104828, 1298506, 16462696, 212457221, 2780615627, 36817036777
OFFSET
1,2
REFERENCES
R. A. Epstein, The Theory of Gambling and Statistical Logic, 1977, Academic Press, ISBN 0-12-240760-1 (pages 362-369 discuss polyforms, including Epstein's polyominoids).
CROSSREFS
KEYWORD
nonn,nice,more
AUTHOR
EXTENSIONS
Corrected and extended by Joseph Myers, Sep 24 2002
STATUS
approved