This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A070144 #11 Feb 16 2025 08:32:46 %S A070144 17,116,212,252,368,370,493,561,587,659,839,850,1156,1186,1196,1297, %T A070144 1582,1599,1629,1912,1920,2115,2352,2555,2574,2713,2774,2778,3251, %U A070144 3473,3728,3746,3751,4286,4298,4307,4313,4319 %N A070144 Numbers n such that [A070080(n), A070081(n), A070082(n)] is a scalene integer triangle with integer area. %H A070144 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HeronianTriangle.html">Heronian Triangle</a>. %H A070144 R. Zumkeller, <a href="/A070080/a070080.txt">Integer-sided triangles</a> %e A070144 a(2)=116: [A070080(116), A070081(116), A070082(116)] = [6<8<10], area^2 = s*(s-6)*(s-8)*(s-10) with s=A070083(116)/2=(6+8+10)/2=12, area^2=12*6*4*2=64*9 is an integer square, therefore A070086(116)=area=8*3=24. %Y A070144 Cf. A070142, A070145. %K A070144 nonn %O A070144 1,1 %A A070144 _Reinhard Zumkeller_, May 05 2002