G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1-x)/(1+x)^(2^n).
A137160
G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1-x)/(1+x)^(2^n).
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =64a(5) =664a(6) =13856a(7) =584668a(8) =49751520a(9) =8509625760
External references
- oeis: A137160
A137160
G.f.: 1 = Sum_{n>=0} a(n)*x^n*(1-x)/(1+x)^(2^n).