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 A324789 #8 Oct 02 2019 12:12:01 %S A324789 3,7,17,49,121,309,847,2237,5997,16163,44827 %N A324789 First differences of A324787: distances in A022837 from n-th low point to the next. %Y A324789 Cf. A022837. See A324787 for further information. %K A324789 nonn,more %O A324789 0,1 %A A324789 _N. J. A. Sloane_, Sep 04 2019 %E A324789 Modified definition to make offset 0. - _N. J. A. Sloane_, Oct 02 2019