x*exp(x)的初始第n次迭代开始于:
n=1:(1)*x+x^2+x^3/2!+x^4/3!+x^5/4!+x^6/5! +...
n=2:x+(2)*x^2+6*x^3/2!+23*x^4/3!+104*x^5/4!+537*x^6/5! +...
n=3:x+3*x^2+(15)*x^3/2!+102*x^4/3!+861*x^5/4!+8598*x^6/5! +...
n=4:x+4*x^2+28*x^3/2!+(274)*x^4/3!+3400*x ^5/4!+50734*x^6/5! +...
n=5:x+5*x^2+45*x^3/2!+575*x^4/3!+(9425)*x^5/4!+187455*x^6/5! +...
n=6:x+6*x^2+66*x^3/2!+1041*x^4/3!+21216*x^5/4!+(527631)*x^6/5!+...
这个序列从上述分隔符中的系数开始。