A256569 a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations.

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.

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