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A257082
a(n) is one sixth of the total number of free ends of 6 line segments expansion at n iterations (see Comments lines for definition).
1
1, 2, 8, 12, 28, 52, 108, 216, 448
OFFSET
1,2
COMMENTS
The initial pattern consists of 6 straight line segments which are the radii of a hexagon. The next generations are scaled down by a factor of tan(Pi/6) and rotated by an angle of Pi/6. Their free ends are the ends of elements that do not contact or cross the other ones. Overlaps among different generations are prohibited. See illustration in the links.
CROSSREFS
Sequence in context: A268836 A027718 A115102 * A265736 A047174 A048074
KEYWORD
nonn,more
AUTHOR
Kival Ngaokrajang, May 06 2015
STATUS
approved