A256582 a(n) is the total number of pentagrams in a variant of pentagram fractal after n iterations.

1, 11, 46, 146, 416, 1136, 2776

Offset

1,2

Comments

Inspired by A255870. But the scale factor is tan(3*Pi/10)/(1+phi) instead of 1/phi.

See illustration in the links.

Links

Table of n, a(n) for n=1..7.

Kival Ngaokrajang, Illustration of initial terms

Crossrefs

Cf. A255870, A256429, A256569, A256571, A256583, A256597.

Sequence in context: A224142 A155014 A006324 * A231887 A302449 A177370

Adjacent sequences: A256579 A256580 A256581 * A256583 A256584 A256585

Keyword

nonn,more

Author

Kival Ngaokrajang, Apr 04 2015

Status

approved