1,4

Table of n, a(n) for n=1..90.

Eric Weisstein's World of Mathematics, Heronian Triangle

Wikipedia, Heronian triangle

Wikipedia, Integer Triangle

a(1) = 1; there is one nonprimitive Heronian triangle with perimeter A334674(1) = 24 whose side lengths are mutually distinct, [6,8,10].

a(2) = 1; there is one nonprimitive Heronian triangle with perimeter A334674(2) = 36 whose side lengths are mutually distinct, [9,12,15].

Cf. A331366, A334665, A334674.

Sequence in context: A201167 A202853 A228572 * A078380 A062356 A257993

Adjacent sequences: A334672 A334673 A334674 * A334676 A334677 A334678

nonn

Wesley Ivan Hurt, May 07 2020

approved