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 A156189 #10 Jul 02 2020 10:45:38 %S A156189 1,3,36,108,1296,3888,46656,139968,1679616,5038848,60466176,181398528, %T A156189 2176782336,6530347008,78364164096,235092492288,2821109907456, %U A156189 8463329722368,101559956668416,304679870005248,3656158440062976 %N A156189 Denominator of Euler(n, 1/6). %H A156189 Vincenzo Librandi, <a href="/A156189/b156189.txt">Table of n, a(n) for n = 0..1000</a> %H A156189 Michael E. Hoffman, <a href="https://doi.org/10.37236/1453">Derivative Polynomials, Euler Polynomials, and Associated Integer Sequences</a>, The Electronic Journal of Combinatorics, Volume 6.1 (1999): Research paper R21, 13 p. See Eq. (13). %t A156189 Denominator[EulerE[Range[0, 20], 1 / 6 ]] (* _Vincenzo Librandi_, Sep 12 2016 *) %Y A156189 For numerators see A156187. %K A156189 nonn,frac %O A156189 0,2 %A A156189 _N. J. A. Sloane_, Nov 07 2009