%I #3 Mar 30 2012 17:29:13
%S 4,6,7,10,12,13,18,24,25,29,33,35,42,45,50,55,59,60,66,68,70,77,78,79,
%T 87,88,89,100,102,104,113,123,126,127,135,136,139,142,152,158,159,165,
%U 169,172,176,184,187,189,197,199,201,203,209,211,216,234,237,244,251
%N A089531 indexed by A000040.
%F a(n)=k such that A089531(n)=A000040(k).
%Y Cf. A023204, A089530, A089531.
%K nonn
%O 1,1
%A _Ray Chandler_, Nov 07 2003