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 A031178 #15 Feb 16 2025 08:32:35 %S A031178 1,1,1,1,3,1,1,1,1,1,1,1,1,3,1,1,3,1,1,1,1,1,3,1,1,3,1,1,3,1,1,3,1,1, %T A031178 1,1,1,1,1,1,3,1,1,1,1,1,3,1,1,2,1,1,3,1,1,3,1,1,1,1,1,3,1,1,3,1,1,1, %U A031178 1,1,1,1,1,1,1,1,1,1,1,3,1,1,3,1,1,1,1,1,1,1,1,1,1,1,2,1,1,3,1,1 %N A031178 Periods of sum of cubes of digits iterated until the sequence becomes periodic. %H A031178 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Digitaddition.html">Digit addition</a> %K A031178 nonn,base %O A031178 0,5 %A A031178 _Eric W. Weisstein_ %E A031178 Missing a(0)=1 inserted by _Sean A. Irvine_, Apr 13 2020