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 A036696 #7 Mar 30 2012 18:56:26 %S A036696 1,3,5,9,11,17,17,19,25,29,33,31,33,45,43,49,45,53,55,61,65,59,73,69, %T A036696 71,85,81,85,83,89,97,91,105,101,109,115,101,121,111,133,125,119,133, %U A036696 133,145,143,133,149,147,157,161,165,163,157,169 %N A036696 a(n)=number of Gaussian integers z=a+bi satisfying n-1<|z|<=n, b>=0. %H A036696 <a href="/index/Ga#gaussians">Index entries for Gaussian integers and primes</a> %K A036696 nonn %O A036696 0,2 %A A036696 _Clark Kimberling_