%I A000173
%S A000173 30,1482,2418,24180,35238,263820,395730,473298,698130,763620,2212026,
%T A000173 2233554,172459210,209524210,341354790,384121920,525150234,530946330,
%U A000173 582129630,1799281330,2069510520,2514290520,3344596854,5251502340
%N A000173 Unitary-sociable numbers (smallest member of each cycle).
%C A000173 If n=product p_i^a_i, d=product p_i^c_i is a unitary divisor of n if 
               each c_i is 0 or a_i.
%D A000173 R. K. Guy, Unsolved Problems in Number Theory, 3rd edition, Sect. B7
%H A000173 Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 01 2006, <a href="b000173.txt">
               Table of n, a(n) for n = 1..44</a>
%H A000173 David Moews, <a href="http://djm.cc/amicable.html">Perfect, amicable 
               and sociable numbers</a>
%H A000173 J. O. M. Pedersen, <a href="http://amicable.homepage.dk/tables.htm">Tables 
               of Aliquot Cycles</a>
%H A000173 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               SociableNumbers.html">Sociable Numbers</a>
%Y A000173 Cf. A034444, A003416, A097323.
%Y A000173 Sequence in context: A002456 A107768 A048536 this_sequence A055351 A103917 
               A089550
%Y A000173 Adjacent sequences: A000170 A000171 A000172 this_sequence A000174 A000175 
               A000176
%K A000173 nonn,nice
%O A000173 1,1
%A A000173 N. J. A. Sloane (njas(AT)research.att.com).
%E A000173 More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 01 2006