G.f.: Sum_{n>=0} ( (1+x)^n - 1 )^n * 4^n / (5 - 4*(1+x)^n)^(n+1).
A317664
G.f.: Sum_{n>=0} ( (1+x)^n - 1 )^n * 4^n / (5 - 4*(1+x)^n)^(n+1).
Terms
- a(0) =1a(1) =4a(2) =96a(3) =3520a(4) =181584a(5) =12046208a(6) =976817408a(7) =93618157824
External references
- oeis: A317664