1,1

A triangle with integer sides and area is also called a Heronian triangle, and every such triangle can be positioned in the plane so that its three vertices have integer coordinates. - Peter Kagey, Jan 24 2018

Peter Kagey and Giovanni Resta, Table of n, a(n) for n = 1..10000 (first 1000 terms from Peter Kagey)

Eric Weisstein's World of Mathematics, Heronian Triangle

Wikipedia, Heronian triangle

Cf. A096468, A298079.

Sequence in context: A080258 A054290 A107308 * A043544 A097620 A089021

Adjacent sequences: A051515 A051516 A051517 * A051519 A051520 A051521

nonn

David W. Wilson

approved