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 A103473 Number of polyominoes consisting of 7 regular unit n-gons. 12
 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; text; internal format)
 OFFSET 3,1 LINKS Table of n, a(n) for n=3..34. Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes, arXiv:math.CO/0605144 S. Kurz, k-polyominoes. 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. 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: A211585 A211599 A282211 * A162451 A307859 A263542 Adjacent sequences: A103470 A103471 A103472 * A103474 A103475 A103476 KEYWORD nonn AUTHOR Sascha Kurz, Feb 07 2005 EXTENSIONS More terms from Sascha Kurz, Jun 09 2006 STATUS approved

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Last modified July 13 21:17 EDT 2024. Contains 374288 sequences. (Running on oeis4.)