program ana;

var i,j,im1,im2,br1,br2,x,n:integer;
s:real;

begin

readln(x,n);
im2:=1;
br2:=1;
for i:=1 to n do
begin
im2:=im2*x;
br2:=br2*i;
end;
//ovde sam radio odmah i ovo x na N i N! a moglo je i sa dve petlje
br1:=0;
s:=0;
for i:=1 to n do
begin
im1:=1;

for j:=1 to i do im1:=im1*i*i;

br1:=br1+i;

s:=s+(im1+im2)/(br1+br2);

end;

writeln(s:2:5);
readln;

end.