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 A079718 #12 Aug 26 2025 09:50:34 %S A079718 6,2,8,4,9,6,8,1,2,8,3,3,5,5,0,3,3,6,8,5,8,9,8,6,9,0,5,6,1,3,7,4,3,8, %T A079718 6,9,1,3,2,8,2,3,0,5,8,4,3,0,0,8,1,3,9,9,5,2,1,2,8,2,6,5,8,4,5,5,9,9, %U A079718 1,5,6,9,8,3,1,7,4,4,6,5,4,6,9,2,6,1,5,9,5,3,8,4,2,1,7,6,1,9,1,5,6,1,9,4,2 %N A079718 Perfect numbers read digit-by-digit. %H A079718 M. J. Halm, <a href="http://untilheaven.tripod.com/id112.htm">Sequences</a> %F A079718 Digitally expand perfect numbers so that each digit becomes a term in the new sequence. %e A079718 E.g., a(10)= 8 because 8 = 10th digit in the perfect number sequence (A000396): 6, 28, 496, 8128, ... %t A079718 Flatten[IntegerDigits[PerfectNumber[Range[10]]]] (* _Paolo Xausa_, Aug 25 2025 *) %Y A079718 Cf. A007376, A000396. %K A079718 nonn,base,less,changed %O A079718 1,1 %A A079718 _Michael Joseph Halm_, Feb 17 2003