%I

%S 1,2,4,10,25,80,267,1078

%N Number of not necessarily connected coin graphs, also known as "penny" graphs.

%C The intersection graph of unit disks which are not allowed to overlap.

%Y Cf. A085632.

%K more,nonn

%O 1,2

%A Leah Hackman (lhackman(AT)cs.ualberta.ca), Martha Lednicky (lednicky(AT)cs.ualberta.ca), _Jim Nastos_ and _Rick L. Shepherd_, Jul 10 2003