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Search: id:A000785
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| A000785 |
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Number of asymmetrical planar partitions of n: planar partitions (A000219) that when regarded as 3-D objects have no symmetry).
(Formerly M1392 N0542)
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+0
9
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| 0, 0, 0, 1, 2, 5, 11, 21, 39, 73, 129, 226, 388, 659, 1100, 1821, 2976, 4828, 7754, 12370, 19574, 30789, 48097, 74725, 115410, 177366, 271159, 412665, 625098, 942932, 1416362, 2119282, 3158840, 4691431, 6942882, 10240503, 15054705
(list; graph; listen)
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OFFSET
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1,5
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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).
P. A. MacMahon, Combinatory Analysis. Cambridge Univ. Press, London and New York, Vol. 1, 1915 and Vol. 2, 1916; see vol. 2, p 332.
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LINKS
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P. A. MacMahon, Combinatory analysis.
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CROSSREFS
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Equals (A048141-3*A048140+2*A000219-A048142)/3. Cf. A000784, A000786, A005987.
Adjacent sequences: A000782 A000783 A000784 this_sequence A000786 A000787 A000788
Sequence in context: A082775 A023548 A144700 this_sequence A049936 A058358 A135119
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Wouter Meeussen (wouter.meeussen(AT)pandora.be)
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