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

Author

Kival Ngaokrajang, Apr 02 2015

Keywords

• nonn
• more

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

• Kival Ngaokrajang, Illustration of initial terms

Crossrefs

Cf. A255870, A256429, A256571.