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A093009 Smallest number m such that m is prime iff n is not prime and the binary representation of m equals n with appended trailing 1's. 2

%I #6 Mar 30 2012 18:50:43

%S 3,95,15,19,95,13,15,17,19,43,95,103,27,29,31,67,35,37,39,41,43,367,

%T 95,199,103,53,223,463,119,61,63,131,67,139,71,73,75,311,79,163,335,

%U 5503,87,89,367,751,95,97,199,101,103,211,215,109,223,113,463,241663

%N Smallest number m such that m is prime iff n is not prime and the binary representation of m equals n with appended trailing 1's.

%C a(n) = Max{A093007(n), A038699(n)};

%C n>1: A070939(a(n))=A070939(n)+A093008(n), A000120(a(n))=A000120(n)+A093008(n).

%K nonn

%O 1,1

%A _Reinhard Zumkeller_, Mar 14 2004

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)