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 A062818 #8 Nov 05 2018 03:08:42 %S A062818 6,22,490,8100,33550330,8589868538,137438691322,2305843008139944000, %T A062818 2658455991569831744654692615953841680, %U A062818 191561942608236107294793378084303638130997321514618858 %N A062818 Values of Moebius transform of perfect numbers, A000396. %H A062818 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %Y A062818 Cf. A000396. %K A062818 nonn %O A062818 1,1 %A A062818 _Labos Elemer_, Jul 20 2001 %E A062818 Offset 1 from _Michel Marcus_, Nov 04 2018