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 A320944 a(n) is the number of perimeter tiles among all rhombic tilings of the 2n-gon. 2
 1, 6, 24, 200, 3216 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 COMMENTS Tiles and polygons all have sides of length 1, as in A006245. LINKS B. E. Tenner, Tiling-based models of perimeter and area, arXiv:1811.00082 [math.CO], 2018. FORMULA a(n) = 2*n*A320945(n) for n > 2. EXAMPLE a(4) = 24 because among the eight rhombic tilings of the octagon, 24 perimeter rhombi appear. CROSSREFS Cf. A320945, A320946, A006245. Sequence in context: A336267 A018981 A052594 * A277985 A091097 A231317 Adjacent sequences:  A320941 A320942 A320943 * A320945 A320946 A320947 KEYWORD nonn,more AUTHOR Bridget Tenner, Oct 24 2018 STATUS approved

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Last modified April 12 21:13 EDT 2021. Contains 342932 sequences. (Running on oeis4.)