%I

%S 12,27,28,38,63,65,67,81,84,100,104,121,124,146,164,170,190,197,227,

%T 251,278,287,290,297,338,371,372,378,382,418,420,428,470,473,477,529,

%U 578,583,587,648,700,711,755,759,766,768,778,846

%N n-th number k such that s(k)=4, where s=A030727.

%K nonn

%O 1,1

%A _Clark Kimberling_