G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n/(1+x)^(2^n-1).
A172401
G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n/(1+x)^(2^n-1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =32a(5) =332a(6) =6928a(7) =292334a(8) =24875760a(9) =4254812880
External references
- oeis: A172401
A172401
G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n/(1+x)^(2^n-1).