%I #5 Mar 30 2012 18:56:43
%S 34,134,234,334,340,434,534,634,734,834,934,1034,1134,1234,1334,1340,
%T 1434,1534,1634,1734,1834,1934,2034,2134,2234,2334,2340,2434,2534,
%U 2634,2734,2834,2934,3034,3134,3234,3334,3340,3400
%N Numbers n such that string 3,4 occurs in the base 10 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_