G.f.: Sum_{n>=0} 4^n * ((1+x)^n - 1)^n.
A301583
G.f.: Sum_{n>=0} 4^n * ((1+x)^n - 1)^n.
Terms
- a(0) =1a(1) =4a(2) =64a(3) =1792a(4) =70736a(5) =3600128a(6) =224255040a(7) =16521605376
External references
- oeis: A301583
A301583
G.f.: Sum_{n>=0} 4^n * ((1+x)^n - 1)^n.