%I A072252
%S A072252 27,93,309,981,2901,7509,13653
%N A072252 Numbers n for which one step of the Collatz iteration (3n+1)/2^r gives 
               rise to values 41,35,29,23,17,11, and 5 for r=1,3,5,..,13.
%F A072252 Appears to be (( 82-12*n)*4^n-1)/3. - Don Reble (djr(AT)nk.ca), Oct 31 
               2005
%Y A072252 Sequence in context: A044595 A101100 A078183 this_sequence A154041 A118615 
               A033659
%Y A072252 Adjacent sequences: A072249 A072250 A072251 this_sequence A072253 A072254 
               A072255
%K A072252 nonn,fini,full
%O A072252 1,1
%A A072252 N. Rathankar (rathankar(AT)yahoo.com), Jul 08 2002
%E A072252 Edited by T. D. Noe (noe(AT)sspectra.com), Apr 10 2009