Exponential generating function = (1+2*x)/(1-2*x)^3.

A014479

Exponential generating function = (1+2*x)/(1-2*x)^3.

Terms

    a(0) =1a(1) =8a(2) =72a(3) =768a(4) =9600a(5) =138240a(6) =2257920a(7) =41287680a(8) =836075520a(9) =18579456000a(10) =449622835200

External references