%I #5 Mar 30 2012 18:56:43
%S 51,132,213,294,375,456,459,537,618,699,780,861,942,1023,1104,1185,
%T 1188,1266,1347,1428,1509,1590,1671,1752,1833,1914,1917,1995,2076,
%U 2157,2238,2319,2400,2481,2562,2643,2646,2724,2805
%N Numbers n such that string 5,6 occurs in the base 9 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_