OFFSET
1,1
COMMENTS
LINKS
Eric Weisstein's World of Mathematics, Heronian Triangle
Wikipedia, Heronian triangle
Wikipedia, Integer Triangle
EXAMPLE
a(1) = 12; there is one Heronian triangle with perimeter 12, which is [3,4,5] and the lengths of the smallest and middle sides are coprime (GCD(3,4) = 1).
a(3) = 32; there is one Heronian triangle with perimeter 32, [4,13,15] and the lengths of the smallest and middle sides are coprime (GCD(4,13) = 1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, May 18 2020
STATUS
approved