OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Heronian Triangle
Wikipedia, Heronian triangle
Wikipedia, Integer Triangle
EXAMPLE
a(1) = 12; there is one primitive Heronian triangle with a perimeter of 12 whose longest side length is squarefree, which is [3,4,5].
a(4) = 32; there is one primitive Heronian triangle with a perimeter of 36 whose longest side length is squarefree, [4,13,15].
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, May 06 2020
STATUS
approved