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Search: id:A006765
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| A006765 |
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Number of polyominoes with n cells.
(Formerly M3421)
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+0
2
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| 0, 0, 1, 4, 11, 34, 107, 368, 1284, 4654, 17072, 63599, 238590, 901970, 3426575, 13079254, 50107908
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
Dan Hoey, Bill Gosper and Rich Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999.
W. F. Lunnon, Counting multidimensional polyominoes. Computer Journal 18 (1975), no. 4, pp. 366-367.
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LINKS
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R. C. Schroeppel, A few mathematical experiments
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CROSSREFS
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A row of A049429.
Sequence in context: A144791 A060925 A027045 this_sequence A151272 A112272 A149234
Adjacent sequences: A006762 A006763 A006764 this_sequence A006766 A006767 A006768
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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