cp's OEIS Frontend

A064795 Home primes in base 2: primes reached when you start with n and (working in base 2) concatenate its prime factors (A048985); repeat until a prime is reached (or -1 if no prime is ever reached).

%I A064795 #5 Aug 11 2024 14:41:34
%S A064795 1,10,11,11111,101,1011,111,10110011,11101,11111,1011,101011,1101,
%T A064795 10111,11101,10111011100111,10001,101111,10011,11111011,11111,101011,
%U A064795 10111,111110011,111111111011,111111111011,1111111,111111111011,11101
%N A064795 Home primes in base 2: primes reached when you start with n and (working in base 2) concatenate its prime factors (A048985); repeat until a prime is reached (or -1 if no prime is ever reached).
%C A064795 a(1) = 1 by convention.
%H A064795 P. De Geest, <a href="https://www.worldofnumbers.com/topic1.htm">Home Primes</a>
%Y A064795 See A048986 for base 10 representation. Cf. A037274.
%K A064795 nonn,base,easy
%O A064795 1,2
%A A064795 _N. J. A. Sloane_, Oct 31 2001
%E A064795 More terms from _David Wasserman_, Aug 15 2002