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A242129 Number of tiles added in each step if a centrally symmetric Penrose rhomb tiling, beginning with a central 'Sun' configuration, is successively extended in steps as defined below. 13
5, 5, 10, 15, 20, 25, 40, 30, 30, 45, 60, 55, 65, 55, 70, 75, 90, 75, 90 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
In each step, add a new tile to each free edge of the current tiling. The first step is the placement of the five central tiles.
LINKS
David Austin, Penrose tiles talk across miles, AMS Feature Column, August 2005.
Wikipedia, Penrose tiling
EXAMPLE
See illustrations in Fröhlich, 2019.
CROSSREFS
Cf. A242128 (5-fold, Star), A242888 (7-fold, Star), A242889 (7-fold, Sun), A242890 (8-fold, Star), A242891 (8-fold, Sun), A242892 (9-fold, Star), A242893 (9-fold, Sun), A242894 (Kite and dart, Star), A242895 (Kite and dart, Sun).
Sequence in context: A138506 A000728 A242895 * A022088 A245418 A082450
KEYWORD
nonn,more
AUTHOR
Felix Fröhlich, May 05 2014
EXTENSIONS
a(8)-a(19) from Felix Fröhlich, Jun 16 2019
STATUS
approved

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)