## Heronian triangles with one side odd of length a = 3,5,7,9,11

There are infinitely many of primitive Heronian triangles with one side of length a > 2

if   $a$   is odd :
the other sides are:     $(a \, t - 1)/2$,     $(a \, t + 1)/2$

where   $t$   is a solution of the Pelian equation
$t^2 \; - \; (a^2 - 1) \, y^2 \; = \; 1$