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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).

Original entry on oeis.org

1, 2, 8, 12, 28, 52, 108, 216, 448
Offset: 1

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Author

Kival Ngaokrajang, May 06 2015

Keywords

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.

Links

Crossrefs

Cf. A238549, A256641.
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