a(n) = sum_{k=0}^n binomial(n,k)^2*4^k*A000108(k).

A228511

a(n) = sum_{k=0}^n binomial(n,k)^2*4^k*A000108(k).

Terms

    a(0) =1a(1) =5a(2) =49a(3) =645a(4) =9921a(5) =167909a(6) =3030705a(7) =57284901a(8) =1120905985a(9) =22531796805a(10) =462793508529

External references