%I #4 Mar 30 2012 18:56:19
%S 3,14,28,35,37,39,41,42,43,45,47,56,70,84,102,123,144,155,158,161,164,
%T 165,167,170,173,186,207,228,249,270,291,302,305,308,311,312,314,317,
%U 320,333,354,375,385,388,391,394,396,397,400
%N Position of n-th 3 in A030998.
%K nonn
%O 1,1
%A _Clark Kimberling_