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