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A256569 a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations. 7
1, 6, 21, 61, 171, 461, 1181, 2951 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Inspired by A255870. But at the higher iterations, the perimeter would be an irregular polygon instead of a pentagon. The construction rule is vertex to vertex expansion. See illustration in the links.

LINKS

Table of n, a(n) for n=1..8.

Kival Ngaokrajang, Illustration of initial terms

CROSSREFS

Cf. A255870, A256429, A256571.

Sequence in context: A334833 A048476 A122678 * A132130 A022571 A321947

Adjacent sequences:  A256566 A256567 A256568 * A256570 A256571 A256572

KEYWORD

nonn,more

AUTHOR

Kival Ngaokrajang, Apr 02 2015

STATUS

approved

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Last modified September 18 10:31 EDT 2020. Contains 337166 sequences. (Running on oeis4.)