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 A005438 M3805 #17 Oct 15 2018 05:20:19 %S A005438 1,1,5,10,56,178,1202,5296,42272,238816,2204480,15214480,159575936, %T A005438 1301989648,15299174672,144118832896,1875796977152,20040052293376, %U A005438 286222128454400,3419989086092800,53183132405282816,702831038438522368 %N A005438 Column of Kempner tableau. %C A005438 See A005437 for an explanation. - _Sean A. Irvine_, Jun 25 2016 %D A005438 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). %H A005438 G. Viennot, <a href="http://www.jstor.org/stable/44165433">Interprétations combinatoires des nombres d'Euler et de Genocchi</a>, Séminaire de théorie des nombres, 1980/1981, Exp. No. 11, p. 41, Univ. Bordeaux I, Talence, 1982. %Y A005438 Cf. A005437. %K A005438 nonn %O A005438 1,3 %A A005438 _Simon Plouffe_ %E A005438 More terms from _Sean A. Irvine_, Jun 25 2016