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A020887 Ordered set of a + b - c as (a,b,c) runs through all primitive Pythagorean triples with a<b<c. 6
2, 4, 6, 6, 8, 10, 10, 12, 12, 14, 14, 16, 18, 18, 20, 20, 22, 22, 24, 24, 26, 26, 28, 28, 30, 30, 30, 30, 32, 34, 34, 36, 36, 38, 38, 40, 40, 42, 42, 42, 42, 44, 44, 46, 46, 48, 48, 50, 50, 52, 52, 54, 54, 56, 56, 58, 58, 60, 60, 60, 60, 62, 62, 64, 66, 66, 66, 66, 68, 68, 70 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also called "excess" of primitive Pythagorean triangles and corresponds to incircle's diameter. - Lekraj Beedassy, Dec 01 2003

LINKS

Table of n, a(n) for n=0..70.

D. McCullough, The Height and Excess of Pythagorean Triples

FORMULA

a(n) = 2*A020888(n).

CROSSREFS

For values ordered by hypotenuse, see A087459.

Sequence in context: A235384 A035280 A244367 * A050827 A082990 A099188

Adjacent sequences:  A020884 A020885 A020886 * A020888 A020889 A020890

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified July 21 17:20 EDT 2019. Contains 325198 sequences. (Running on oeis4.)