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A192494 Denominators of squared radii of circumcircles of non-degenerate triangles with integer vertex coordinates. 12
2, 1, 4, 18, 16, 1, 2, 9, 8, 4, 98, 50, 18, 1, 16, 4, 98, 50, 2, 64, 242, 36, 18, 1, 64, 16, 9, 196, 50, 4, 338, 98, 2, 49, 64, 242, 25, 162, 18, 9, 4, 338, 578, 256, 98, 50, 324, 722, 242, 16, 1, 18, 8, 100, 2, 98, 98, 49, 242, 25, 722, 1058, 1, 36, 32, 16, 121, 4, 578, 338, 18, 256, 98, 9, 144, 484, 50, 64, 50, 242, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 1..9089, covering range R^2 <= 100.
EXAMPLE
The smallest triangle of lattice points {(0,0),(1,0),(0,1)} has circumradius R=sqrt(2)/2, i.e., R^2=1/2. Therefore A192493(1)=1, a(1)=2.
CROSSREFS
Cf. A192493 (corresponding numerators).
Sequence in context: A025228 A267377 A132945 * A013156 A012925 A012930
KEYWORD
nonn,frac
AUTHOR
Hugo Pfoertner, Jul 10 2011
STATUS
approved

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)