A338992 Number of vertices of a hexagonal tessellation that lie on subsequent circles centered at the center of one hexagon.

0, 6, 6, 12, 12, 6, 12, 6, 12, 12, 12, 12, 18, 12, 12, 6, 12, 12, 12, 12, 24, 12, 6, 12, 12, 12, 6, 12, 12, 24, 12, 12, 12, 12, 12, 18, 12, 12, 12, 12, 18, 12, 12, 12, 24, 12, 12, 12, 12, 24, 6, 24, 12, 12, 12, 12, 6, 12, 24, 12, 12, 12, 12, 12, 12, 12, 24, 12, 18

Offset

0,2

Comments

Radii of these circles are square roots of A202822.

This is A217219 with zeros dropped, except for a(0). - Andrey Zabolotskiy, Jun 21 2022

Links

Table of n, a(n) for n=0..68.

Szymon Lukaszyk, MATLAB script

Szymon Lukaszyk, A short note about the geometry of graphene, ResearchGate, (2020).

Szymon Lukaszyk, Illustration of the subsequent 36 radii around a hex center.

Crossrefs

Cf. A202822, A217219, A338947 (similar but with circles centered at a vertex of one hexagon).

Sequence in context: A028317 A220435 A340512 * A055665 A168328 A176569

Adjacent sequences: A338989 A338990 A338991 * A338993 A338994 A338995

Keyword

nonn

Author

Szymon Lukaszyk, Nov 17 2020

Status

approved