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 A374089 #6 Jun 28 2024 09:09:10 %S A374089 0,0,0,0,0,1,0,0,0,0,0,2,0,0,0,0,0,0,0,2,1,0,0,0,0,0,0,0,0,2,0,2,0,0, %T A374089 0,0,0,0,0,0,0,2,0,0,2,1,0,0,0,0,0,0,0,0,0,2,0,0,0,2,0,2,0,0,0,0,0,0, %U A374089 0,0,0,2,0,0,0,0,2,0,0,2,1,0,0,0,0,0,0,0,0,2,0,0,0,0,0,2,0,0,0,2,0,2 %N A374089 Number of ordered pairs (x,y) of positive integers such that x^2 + 3*x*y + y^2 = n. %H A374089 Seiichi Manyama, <a href="/A374089/b374089.txt">Table of n, a(n) for n = 0..10000</a> %K A374089 nonn %O A374089 0,12 %A A374089 _Seiichi Manyama_, Jun 28 2024