G.f.: Sum_{n>=0} ((1+x)^(n+1) - 1)^n.

A321089

G.f.: Sum_{n>=0} ((1+x)^(n+1) - 1)^n.

Terms

    a(0) =1a(1) =2a(2) =10a(3) =82a(4) =928a(5) =13406a(6) =235690a(7) =4883702a(8) =116548222a(9) =3148151702a(10) =94950591878

External references