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 A031186 #15 Feb 16 2025 08:32:36 %S A031186 1,1,12,22,4,10,22,28,10,22,1,12,22,28,12,22,6,10,22,28,12,22,28,12, %T A031186 22,28,10,22,28,12,22,28,12,22,28,10,22,4,12,22,4,12,22,28,10,22,28, %U A031186 10,22,28,10,22,28,10,22,4,12,22,28,12,22,6,10,22,28,12,22,28,10,22 %N A031186 Periods of sum of 5th powers of digits iterated until the sequence becomes periodic. %H A031186 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Digitaddition.html">Digitaddition.</a> %K A031186 nonn,base %O A031186 0,3 %A A031186 _Eric W. Weisstein_ %E A031186 Missing a(0)=1 inserted by _Sean A. Irvine_, Apr 14 2020