G.f. Sum_{n>=0} ((1 + 2*x)^n - (1 + x)^n)^n.
A323323
G.f. Sum_{n>=0} ((1 + 2*x)^n - (1 + x)^n)^n.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =39a(4) =508a(5) =8651a(6) =180541a(7) =4462875a(8) =127461499a(9) =4129414609a(10) =149614338010
External references
- oeis: A323323