# L(n,x) is Laguerre polynomials;

L(n_,x_):=sum((-1)^k*binomial(n,k)*x^k/k!,k,0,n);

L(x_,n_,0):=polylog(n,x);
L(x_,n_,1):=polylog(n,x)/x;
L(x_,n_,oo):=0;