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Search: id:A002881
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| A002881 |
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Number of imperfect squared rectangles of order n.
(Formerly M4614 N1969)
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+0
5
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| 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 9, 34, 104, 283, 957, 3033, 9519
(list; graph; listen)
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OFFSET
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1,12
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COMMENT
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The order of a squared rectangle is the number of squares into which it is divided.
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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).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
C. J. Bouwkamp, personal communication.
M. Gardner, The 2nd Scientific American Book of Mathematical Puzzles and Diversions. Simon and Schuster, NY, 1961, p. 207.
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LINKS
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Eric Weisstein's World of Mathematics, Perfect Rectangle
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CROSSREFS
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Cf. A006983, A002962, A002839, A014530.
Sequence in context: A147691 A000441 A067989 this_sequence A005344 A050478 A154393
Adjacent sequences: A002878 A002879 A002880 this_sequence A002882 A002883 A002884
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KEYWORD
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hard,nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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