O.g.f. satisfies A^2(z) = 1/(1 - z)*( BINOMIAL(BINOMIAL(A(z))) ).
A258377
O.g.f. satisfies A^2(z) = 1/(1 - z)*( BINOMIAL(BINOMIAL(A(z))) ).
Terms
- a(0) =1a(1) =3a(2) =13a(3) =79a(4) =649a(5) =6955a(6) =93813a(7) =1539991a(8) =29884881a(9) =669628819a(10) =17005862301a(11) =482399018527
External references
- oeis: A258377