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 A316853 #18 Jul 28 2025 20:17:16 %S A316853 3,15,48,63,35,128,243,135,320,63,240,495,768,275,231,576,975,99,384, %T A316853 819,1344,1875,455,1008,351,896,1575,2304,143,560,1215,2048,2975,3888, %U A316853 735,675,1536,2499,495,1280,2295,3456,4655,195,768,1683,2880,4275 %N A316853 Areas of all nondegenerate integer triangles, T, expressed as 16*area(T)^2. a(n) is for the triangle with sides A316841(n, 1..3). %C A316853 The squared area of an integer triangle is necessarily a multiple of 1/16. %H A316853 Lars Blomberg, <a href="/A316853/b316853.txt">Table of n, a(n) for n = 1..3000</a> %H A316853 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TriangleArea.html">Triangle Area</a>. %F A316853 a(n) = 16*s*(s-a)*(s-b)*(s-c) where s = A316851(n)/2, and a,b,c are A316843(n), A316844(n), A316845(n). %Y A316853 Cf. A316841, A316842, A316843, A316844, A316845, A316851. %K A316853 nonn %O A316853 1,1 %A A316853 _N. J. A. Sloane_, Jul 23 2018 %E A316853 Name edited by _Peter Munn_, May 10 2025