a(n) = A027907(2^n, n), where A027907 = triangle of trinomial coefficients.
A136518
a(n) = A027907(2^n, n), where A027907 = triangle of trinomial coefficients.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =112a(4) =3620a(5) =360096a(6) =116950848a(7) =129755798400
External references
- oeis: A136518