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 A111154 #3 Mar 30 2012 18:39:24 %S A111154 1,1,5,22,125,948,8627,86618,970649,13105048,206672615,3084750894, %T A111154 39005776445,972651041372,45030832321499,489627529809250, %U A111154 -65060172242461567,100399556385989760,378285729309697789679,921583343151423434486,-2826260367937145199562267 %N A111154 a(n) = sum(k=0,n,B_k*A000629(k)*A000629(n-k)) where B_k is the k-th Bernoulli number. %Y A111154 Cf. A052882. %K A111154 sign %O A111154 0,3 %A A111154 _Benoit Cloitre_, Oct 19 2005