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Numbers n such that string 4,7 occurs in the base 8 representation of n but not of n+1.
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%I #5 Mar 30 2012 18:56:45

%S 39,103,167,231,295,319,359,423,487,551,615,679,743,807,831,871,935,

%T 999,1063,1127,1191,1255,1319,1343,1383,1447,1511,1575,1639,1703,1767,

%U 1831,1855,1895,1959,2023,2087,2151,2215,2279,2343

%N Numbers n such that string 4,7 occurs in the base 8 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_