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 A071588 #16 Sep 15 2023 07:51:24 %S A071588 1,6,63,612,6921,6777,65664,639972,6169761,69677001,67166406, %T A071588 650797263,6332876712,61049606031,69046146387,675489481074, %U A071588 6547099011282,63744495662961,614866659955101,694010047953906,6792600448516563 %N A071588 Powers of 6 written backwards. %H A071588 Seiichi Manyama, <a href="/A071588/b071588.txt">Table of n, a(n) for n = 0..1000</a> %F A071588 a(n) = A004086(A000400(n)). %t A071588 FromDigits[Reverse[IntegerDigits[#]]]&/@(6^Range[0,30]) (* _Harvey P. Dale_, Feb 02 2012 *) %o A071588 (PARI) for(i=1,50,n=5^i; s=ceil(log(n)/log(10)); print1(sum(i=0,s,10^(s-i-1)*(floor(n/10^i)-10*floor(n/10^(i+1)))),",")) %Y A071588 Cf. A000400, A004086, A004094, A004167, A071582, A071583, A071584, A071586, A071587. %K A071588 easy,nonn,base %O A071588 0,2 %A A071588 _Benoit Cloitre_, Jun 01 2002