A337545 a(n) is the number of pentagons at distance n from the central pentagon of a pentaflake.

1, 5, 10, 5, 15, 20, 10, 30, 15, 15, 20, 50, 25, 25, 50, 30, 50, 40, 80, 35, 65, 30, 30, 45, 55, 40, 40, 80, 140, 30, 90, 55, 35, 80, 80, 55, 65, 150, 60, 100, 90, 110, 80, 140, 100, 70, 120, 210, 70, 170, 105, 125, 100, 180, 45, 55, 90, 60, 80, 110, 105, 65

Offset

0,2

Comments

For symmetry reasons, a(n) is a multiple of 5 for any n > 0.

Links

Rémy Sigrist, Table of n, a(n) for n = 0..1529

Rémy Sigrist, Illustration of initial terms

Rémy Sigrist, C# program for A337545

Wikipedia, Pentaflake

Prog

(C#) See Links section.

Crossrefs

See A337018 for similar sequences.

Sequence in context: A110643 A010721 A046795 * A229793 A285585 A205854

Adjacent sequences: A337542 A337543 A337544 * A337546 A337547 A337548

Keyword

nonn

Author

Rémy Sigrist, Nov 22 2020

Status

approved