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 A115748 #8 Oct 28 2012 04:42:38 %S A115748 63301,651001,6967932,2158803990,88858402692 %N A115748 Numbers n such that sigma(n)=7*reversal(n). %C A115748 a(6) > 10^12. - _Giovanni Resta_, Oct 28 2012 %e A115748 2158803990 is in the sequence because sigma(2158803990) %e A115748 =6951619584=7*993088512=7*reversal(2158803990). %Y A115748 Cf. A069216, A105324, A114928. %K A115748 base,more,nonn %O A115748 1,1 %A A115748 _Farideh Firoozbakht_, Feb 12 2006 %E A115748 a(5) from _Donovan Johnson_, Dec 21 2008