a(n) = 2^n*J(n, 1/2) where J(n, x) are the Jacobsthal polynomials as defined in A322942.

A323232

a(n) = 2^n*J(n, 1/2) where J(n, x) are the Jacobsthal polynomials as defined in A322942.

Terms

    a(0) =1a(1) =3a(2) =9a(3) =51a(4) =225a(5) =1083a(6) =5049a(7) =23811a(8) =111825a(9) =525963a(10) =2472489a(11) =11625171a(12) =54655425a(13) =256967643a(14) =1208146329a(15) =5680180131a(16) =26705711025a(17) =125558574123a(18) =590321410569

External references