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 A156634 #6 Sep 12 2016 02:57:31 %S A156634 1,9,324,729,104976,236196,34012224,76527504,11019960576,24794911296, %T A156634 3570467226624,8033551259904,1156831381426176,2602870608208896, %U A156634 374813367582081024,843330077059682304,121439531096594251776 %N A156634 Denominator of Euler(n, 1/18). %H A156634 Vincenzo Librandi, <a href="/A156634/b156634.txt">Table of n, a(n) for n = 0..200</a> %t A156634 Denominator[EulerE[Range[0, 30], 1/18]] (* _Vincenzo Librandi_, Sep 12 2016 *) %Y A156634 For numerators see A156633. %K A156634 nonn,frac %O A156634 0,2 %A A156634 _N. J. A. Sloane_, Nov 07 2009