%I A050927
%S A050927 1,2,10,31,90,222,520,1090,2180,4090,7356,12660,21105,34020,53460,
%T A050927 81891,122826,180510,260746,370370,518518,715870,976170,1315470,
%U A050927 1753975,2314936,3027224,3923845,5044920,6436200,8152542,10255896
%N A050927 Number of directed multigraphs with loops on 3 nodes with n arcs.
%F A050927 G.f.: (x^10+3*x^8+10*x^7+16*x^6+12*x^5+16*x^4+10*x^3+3*x^2+1) / ((1-x^3)^3*(1-x^2)^4*(1-x)^2).
%Y A050927 Cf. A005993.
%Y A050927 Sequence in context: A090809 A051747 A024456 this_sequence A011921 A103290 
               A131068
%Y A050927 Adjacent sequences: A050924 A050925 A050926 this_sequence A050928 A050929 
               A050930
%K A050927 easy,nonn
%O A050927 0,2
%A A050927 Vladeta Jovovic (vladeta(AT)eunet.rs), Dec 30 1999