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%I #2 Mar 30 2012 16:51:15
%S 7,33367,2237423527,715153093789687,698774745485355051847,
%T 1632180870878422847476890007,7791592461957309952817483706344167,
%U 68182479037890270018102486211434811414327,1009677846565093510000577124729596523472890660487,23798205151780687193785106278522250169201817256662802647
%N A bisection of A002437.
%K nonn
%O 0,1
%A _N. J. A. Sloane_, Nov 06 2009