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 A028603 #5 Jul 08 2025 18:39:36 %S A028603 1,0,6,0,12,12,8,48,6,60,72,48,120,96,96,160,204,60,180,336,156,96, %T A028603 384,288,248,384,252,640,576,300,528,912,390,480,840,576,900,768,528, %U A028603 960,1272,348,960,1776,816,1080 %N A028603 Expansion of (theta_3(z)*theta_3(9z)+theta_2(z)*theta_2(9z))^3. %K A028603 nonn %O A028603 0,3 %A A028603 _N. J. A. Sloane_