%I A055509
%S A055509 0,0,2,0,1,2,5,0,5,1,4,2,2,5,3,0,3,5,6,1,0,4,3,2,6,2,24,5,5,3,23,0,6,3,
%T A055509 2,5,6,6,10,1,24,0,7,4,3,3,22,2,6,6,5,2,2,24,23,5,7,5,10,3,4,23,19,0,6,
%U A055509 6,8,3,2,2,21,5,24,6,1,6,5,10,10,1,4,24,23,0,0,7,8,4,9,3,19,3,2,22,19
%N A055509 Number of odd primes in sequence obtained in 3x+1 (or Collatz) problem 
               starting at n.
%H A055509 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               CollatzProblem.html">Collatz Problem</a>
%H A055509 <a href="Sindx_3.html#3x1">Index entries for sequences related to 3x+1 
               (or Collatz) problem</a>
%Y A055509 Cf. A055510.
%Y A055509 Sequence in context: A074704 A025247 A127767 this_sequence A006667 A112570 
               A127755
%Y A055509 Adjacent sequences: A055506 A055507 A055508 this_sequence A055510 A055511 
               A055512
%K A055509 nonn
%O A055509 1,3
%A A055509 G. L. Honaker, Jr. (honak3r(AT)gmail.com), Jun 30 2000
%E A055509 More terms from Larry Reeves (larryr(AT)acm.org), Aug 09 2001