G.f.: Sum_{n>=0} ((1+x)^(2*n) - 1)^n.
A301584
G.f.: Sum_{n>=0} ((1+x)^(2*n) - 1)^n.
Terms
- a(0) =1a(1) =2a(2) =17a(3) =264a(4) =5784a(5) =163610a(6) =5667551a(7) =232280480a(8) =10991951114a(9) =589780778314
External references
- oeis: A301584
A301584
G.f.: Sum_{n>=0} ((1+x)^(2*n) - 1)^n.