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Search: id:A120103
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| A120103 |
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Number of polyominoes consisting of 9 regular unit n-gons. |
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+0
9
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| 160, 1285, 14445, 6572, 14982, 65323, 280014, 664411, 1908239, 1314914, 1968684, 4158216, 9707046, 17054708, 33522023, 26019735, 33942901, 56537856, 100952307, 153177526, 251530341, 208524646, 254079408, 374310135, 586169115, 812395658
(list; graph; listen)
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OFFSET
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3,1
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REFERENCES
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Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes, preprint, http://de.arXiv.org/abs/math.CO/0605144
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EXAMPLE
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a(3)=160 because there are 160 polyiamonds consisting of 9 triangles and a(4)=1285 because there are 1285 polyominoes consisting of 9 squares.
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CROSSREFS
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Cf. A000577, A000104, A000105, A000228, A103465, A103466, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A103465, A120102, A120104.
Sequence in context: A127338 A138854 A133530 this_sequence A127409 A013447 A013446
Adjacent sequences: A120100 A120101 A120102 this_sequence A120104 A120105 A120106
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KEYWORD
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nonn
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AUTHOR
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Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jun 09 2006
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