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Search: id:A089300
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| A089300 |
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Number of planar partitions of n (A000219) that are non-squashing along rows and down columns (cf. A018819). |
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+0
3
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| 1, 1, 3, 4, 9, 13, 25, 33, 56, 76, 122, 170, 264, 360, 538, 707, 1002, 1332, 1853, 2409, 3294
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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N. J. A. Sloane and J. A. Sellers, On non-squashing partitions, Discrete Math., 294 (2005), 259-274.
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EXAMPLE
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E.g. a(4) = 9:
4.31.3.22.2.211.21..2..11
.....1....2.....1...1..11
....................1....
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CROSSREFS
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Cf. A000219, A000123, A018819, A008763, A001970, A089292.
Adjacent sequences: A089297 A089298 A089299 this_sequence A089301 A089302 A089303
Sequence in context: A116552 A124285 A131326 this_sequence A079284 A000624 A056514
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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), Dec 25 2003
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EXTENSIONS
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More terms from Wouter Meeussen (wouter.meeussen(AT)pandora.be), Dec 30 2003
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