A020887 Ordered set of a + b - c as (a,b,c) runs through all primitive Pythagorean triples with a

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

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Comments

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

Links

• Ray Chandler, Table of n, a(n) for n = 1..10000
• D. McCullough, The Height and Excess of Pythagorean Triples

Crossrefs

For values ordered by hypotenuse, see A087459.

Formula

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

Extensions

Offset corrected to 1 by Ray Chandler, Jan 23 2020