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 A063463 #18 Sep 18 2024 11:22:59 %S A063463 -431,-255583,-35570638,-91171007,2486784401,29023111918, %T A063463 22856131408177,1852951469375105,1350851394985294310, %U A063463 12157664947056928801,984770900976342015089,8862938117851348434466,6461081889221243795253265,523347633027349958757558113 %N A063463 Squarefree numbers arising in A024110. %H A063463 Harry J. Smith, <a href="/A063463/b063463.txt">Table of n, a(n) for n = 1..41</a> %o A063463 (PARI) for(n=1,30, if(issquarefree(9^n-n^9),print1(9^n-n^9, ", "))) %Y A063463 Cf. A024110. %K A063463 easy,sign %O A063463 1,1 %A A063463 _Jason Earls_, Jul 26 2001 %E A063463 Offset changed by _Andrew Howroyd_, Sep 18 2024