A044539 - OEIS

%I #5 Mar 30 2012 18:56:45

%S 20,69,118,146,167,216,265,314,363,412,461,489,510,559,608,657,706,

%T 755,804,832,853,902,951,1028,1049,1098,1147,1175,1196,1245,1294,1343,

%U 1392,1441,1490,1518,1539,1588,1637,1686,1735,1784

%N Numbers n such that string 2,6 occurs in the base 7 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_