Question: Series as Sigma summation representation

Supposing as a nice simple example I use the power series command,

series(ex, x=0,8)

to get,

1+x+12x2 + 16x3 + 124x4 + 1120x5 + 1720x6 + 15040x7

Is there automated anyway to get this as a Sigma representation? 

Please Wait...