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A103473
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Number of polyominoes without holes consisting of 7 regular unit n-gons.
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12
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24, 108, 551, 333, 558, 1605, 4418, 8350, 17507, 13512, 17775, 30467, 55264, 83252, 134422, 112514, 135175, 195122, 294091, 397852, 566007, 495773, 568602, 751172, 1031920, 1307384, 1729686, 1557663, 1737915, 2169846, 2808616, 3413064
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,1
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REFERENCES
| Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes http://de.arXiv.org/abs/math.CO/0605144
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LINKS
| S. Kurz, k-polyominoes.
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EXAMPLE
| a(3)=24 because there are 24 polyiamonds consisting of 7 triangles and a(4)=108 because there are 108 polyominoes consisting of 7 squares.
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CROSSREFS
| Cf. A103469, A103470, A103471, A103472.
Cf. A000577, A000104, A000228, A103465, A103466, A103467, A103468, A103469, A103470, A103471, A103472, A115071, A120102, A120103, A120104.
Sequence in context: A060334 A187163 A101862 * A162451 A064595 A064591
Adjacent sequences: A103470 A103471 A103472 * A103474 A103475 A103476
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KEYWORD
| nonn
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AUTHOR
| Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Feb 07 2005
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jun 09 2006
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