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%I #25 Feb 01 2021 19:08:13
%S 12,16,18,30,36,42,44,48,50,54,56,60,64,66,68,70,76,78,80,84,90,96,98,
%T 100,104,108,112,128,130,132,140,144,150,152,154,156,160,162,164,170,
%U 172,174,176,180,182,186,190,192,196,198,200,204,208,210,216,220,222,224,228
%N Perimeters of primitive Heronian triangles whose shortest side length is squarefree.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/HeronianTriangle.html">Heronian Triangle</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Heronian_triangle">Heronian triangle</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Integer_triangle">Integer Triangle</a>
%e a(1) = 12; there is one primitive Heronian triangle with a perimeter of 12 whose shortest side length is squarefree, which is [3,4,5].
%e a(5) = 36; there is one primitive Heronian triangle with a perimeter of 36 whose shortest side length is squarefree, [10,13,13].
%Y Cf. A008683, A330869, A334453, A334560.
%K nonn
%O 1,1
%A _Wesley Ivan Hurt_, May 06 2020
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