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 A031193 #19 Feb 16 2025 08:32:36 %S A031193 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72, %T A031193 75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,120,123,126,129, %U A031193 132,135,138,141,144,147,150,153,156,159,162,165,168,171,174 %N A031193 Numbers having period-22 5-digitized sequences. %C A031193 This sequence consists of those n whose trajectory under the "sum of fifth power of digits" function has period 22. All elements are multiples of 3, but some multiples of 3, the least being 0 and 888, are not in the sequence. - _David W. Wilson_, Aug 03 2005 %C A031193 Multiples of 3 have period 22 (like 3), period 1 (like 888), or period 2 (like 38889). The absence of 888 from this sequence is enough to demonstrate that it is not a Beatty sequence. - _Charles R Greathouse IV_, Jan 27 2022 %H A031193 Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/NonRecursions.html">Non Recursions</a> %H A031193 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Digitaddition.html">Digitaddition</a> %Y A031193 Cf. A055014 (sum of 5th powers of digits). %K A031193 nonn,base %O A031193 1,1 %A A031193 _Eric W. Weisstein_