%I A003014
%S A003014 1,1,4,21,124,705,3726,18361,85240,376641,1597690,6551721,
%T A003014 26116740,101647585,387634534,1452554265,5360857456,19523426433,
%U A003014 70272302706,250318462537,883418329660,3091835703201,10739780397214
%N A003014 Expansion of 1+x*exp(x)+x^2*exp(2*x)+x^3*exp(3*x).
%F A003014 n + n(n-1)2^(n-2) + n(n-1)(n-2)3^(n-3). - R. Stephan, Mar 24 2004
%Y A003014 Sequence in context: A101810 A001888 A103769 this_sequence A108404 A115136 
               A101478
%Y A003014 Adjacent sequences: A003011 A003012 A003013 this_sequence A003015 A003016 
               A003017
%K A003014 nonn
%O A003014 0,3
%A A003014 N. J. A. Sloane (njas(AT)research.att.com).