Problem 353

Distances in a bee's honeycomb

Problem 355

Distances in a bee's honeycomb

Problem 354

Consider a honey bee's honeycomb where each cell is a perfect regular hexagon with side length .
p354_bee_honeycomb.png
One particular cell is occupied by the queen bee.
For a positive real number
, let count the cells with distance from the queen bee cell (all distances are measured from centre to centre); you may assume that the honeycomb is large enough to accommodate for any distance we wish to consider.
For example,
, and .
Find the number of such that .