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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
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.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Kival Ngaokrajang, Apr 02 2015
STATUS
approved