A044321 - OEIS

%I #5 Mar 30 2012 18:56:43

%S 70,151,232,313,394,475,556,630,718,799,880,961,1042,1123,1204,1285,

%T 1359,1447,1528,1609,1690,1771,1852,1933,2014,2088,2176,2257,2338,

%U 2419,2500,2581,2662,2743,2817,2905,2986,3067,3148

%N Numbers n such that string 7,7 occurs in the base 9 representation of n but not of n-1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_