%I

%S 17,71,117,179,217,271,317,371,417,471,517,571,617,671,719,771,817,

%T 871,917,971,1017,1071,1117,1179,1217,1271,1317,1371,1417,1471,1517,

%U 1571,1617,1671,1799,1817,1871,1917,1971,2017,2071

%N Numbers n such that 1 and 7 occur juxtaposed in the base 10 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_