OFFSET
1,3
EXAMPLE
The diameter of the n-th circumcircle in the sorted list is D(n) = 2*sqrt(A331227(n)/A331228(n)). The list of diameters, rounded to 10^-4, starts: {1.1547, 2.0656, 2.3094, 3.0237, 3.0426, 3.1820, 3.4641, 4.0249, 4.0316, 4.1312, 4.1312, 4.3149, 4.6188, 5.0000, 5.0252, ...}.
a(1) = 0: 0 circles with D <= 1,
a(2) = 1: 1 circle (D = 1.1547) with 1 < D <= 2,
a(3) = 3: a(2) + 2 circles (D = 2.0656, 2.3094) with 2 < D <= 3,
a(4) = 7: a(3) + 4 circles (D = 3.02, 3.04, 3.18, 3.46) with 3 < D <= 4,
a(5) = 14: a(4) + 7 circles (D = 4.0249, ..., 5) with 4 < D <= 5.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Hugo Pfoertner, Jan 13 2020
STATUS
approved