%I
%S 4,27,119,497,2023,8149,32692,130938,524050,2096730,8387859,33553102,
%T 134215364,536866711,2147476180
%N Bisection of A013697.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, May 13 2011
