A047011 - OEIS

%I #5 Mar 30 2012 18:56:51

%S 1,2,3,5,10,16,31,60,120,228,452,895,1790,3520,7018,13984,27968,55572,

%T 111004,221668,443336,884224,1767479,3532564,7065128,14112700,

%U 28218316,56418922,112837844,225544128,451034436,901933152,1803866304

%N Sum{T(i,n-i): i=0,1,...,n}, array T given by A047010.

%K nonn

%O 0,2

%A _Clark Kimberling_