OFFSET
1,2
EXAMPLE
The radius of the m-th circumcircle in the sorted list is R(m) = sqrt(A331227(m)/A331228(m)). The list of radii, rounded to 10^-4, starts: {0.57735, 1.0328, 1.1547, 1.5119, 1.5213, 1.5910, 1.7321, 2.0125, 2.0158, 2.0656, 2.0656, 2.1574, 2.3094, 2.5000, 2.5126, 2.5516, 2.5621, 2.6207, 2.6318, 2.7136, 2.7277, 2.8868, 3.0067, ...}.
a(1) = 1: 1 circle (R = 0.57735) with R <= 1,
a(2) = 7: a(1) + 6 circles (R = 1.0328, 1.1547, 1.5119, 1.5213, 1.5910, 1.7321) with 1 < R <= 2,
a(3) = 22: a(2) + 15 circles (R = 2.0125, 2.0158, 2.0656, 2.0656, 2.1574, 2.3094, 2.5000, 2.5126, 2.5516, 2.5621, 2.6207, 2.6318, 2.7136, 2.7277, 2.8868) with 2 < R <= 3.
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Jan 13 2020
STATUS
approved