%I #5 Mar 30 2012 18:56:45
%S 10,59,76,108,157,206,255,304,353,402,419,451,538,549,598,647,696,745,
%T 762,794,843,892,941,990,1039,1088,1105,1137,1186,1235,1284,1333,1382,
%U 1431,1448,1480,1529,1578,1627,1676,1725,1774
%N Numbers n such that string 1,3 occurs in the base 7 representation of n but not of n+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_