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 A176729 #13 Aug 29 2019 17:22:12 %S A176729 1,2,1,4,1,6,1,24,1,10,1,12,1,210,1,48,1,90,1,420,1,330,1,360,1,1638, %T A176729 1,28,1,30,1,7392,1,510,1,36,1,51870,1,840,1,6930,1,13860,1,4830,1, %U A176729 1008,1,99450,1,5148,1,2970,1,3192,1,870,1,180,1,2792790,1,137280,1,1530,1,5796 %N A176729 Denominator of z-sequence for Sheffer triangle A060081. %C A176729 The numerator sequence is A176728. %H A176729 W. Lang: <a href="/A176728/a176728.txt">Rationals A176728/A176729</a>. %F A176729 E.g.f. for rationals A176728/A176729: (1-sqrt(1-x^2))/log(sqrt((1+x)/(1-x))). For n=0 one has a(0)=1, hence A176728(0)/a(0)=0. %e A176729 Rationals A176728/A176729 with offset 0: [0, 1/2, 0, -1/4, 0, -17/6, 0, -1955/24, 0, -44089/10, 0, -4627969/12, ... ]. %Y A176729 A176726/A176727 a-sequence for triangle A060081. %K A176729 nonn,easy,frac %O A176729 1,2 %A A176729 _Wolfdieter Lang_, Jul 14 2010