E.g.f.: exp(-2) * Sum_{n>=0} ((1+x)^n + 1)^n / n!.
A326431
E.g.f.: exp(-2) * Sum_{n>=0} ((1+x)^n + 1)^n / n!.
Terms
- a(0) =1a(1) =3a(2) =26a(3) =393a(4) =8806a(5) =268011a(6) =10496566a(7) =509611213a(8) =29841622422
External references
- oeis: A326431
A326431
E.g.f.: exp(-2) * Sum_{n>=0} ((1+x)^n + 1)^n / n!.