%I #2 Mar 31 2012 13:21:56
%S 0,1,1,3,3,9,9,18,24,38,46,73,89,129,168,223,281,379,472,619,780,992,
%T 1233,1567,1938,2424,2992,3706,4537,5596,6812,8333,10123,12294,14859,
%U 17965,21601,25997,31161,37322,44543,53162,63219,75155
%N A000041(n)-A000010(n).
%Y Cf. A000010, A000041.
%K nonn
%O 1,4
%A _Jon Perry_, Jul 29 2003