a(n) = Sum_{k>=1} (4*k - 2)^n / 2^k.

A355219

a(n) = Sum_{k>=1} (4*k - 2)^n / 2^k.

Terms

    a(0) =1a(1) =6a(2) =68a(3) =1176a(4) =27152a(5) =783456a(6) =27126848a(7) =1095801216a(8) =50589024512

External references