%I A067066
%S A067066 1,2,1,3,4,1,4,9,6,1,5,16,21,8,1,6,25,52,45,10,1,7,36,105,160,93,12,1,
%T A067066 8,49,186,425,484,189,14,1,9,64,301,936,1705,1456,381,16,1,10,81,456,
%U A067066 1813,4686,6825,4372,765,18,1,11,100,657,3200,10885,23436,27305,13120
%N A067066 Number of Gnutella users reachable with given connections and hops.
%H A067066 Jordan Ritter, <a href="http://www.darkridge.com/~jpr5/doc/gnutella.html">
               Why Gnutella Can't Scale. No, Really.</a>
%F A067066 T(n, k)=n*sum(i=0, k-1, (n-1)^i)
%Y A067066 Sequence in context: A093375 A103283 A104698 this_sequence A125103 A107616 
               A055208
%Y A067066 Adjacent sequences: A067063 A067064 A067065 this_sequence A067067 A067068 
               A067069
%K A067066 nonn,tabl,easy
%O A067066 0,2
%A A067066 Michael Somos, Feb 17 2002